From nobody Fri Nov 29 21:00:48 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass(p=none dis=none) header.from=kernel.org ARC-Seal: i=1; a=rsa-sha256; t=1626480000; cv=none; d=zohomail.com; s=zohoarc; b=RDS2/baq11IuUXFn6LBPbDW0CJB20UD7+gNG30GdwxoKYkuuocP2pg+e8IylId3i6jdipYOS+NuRR7dfK5S7uELKcEjwXvpQQ4Y6jdkMVwpTJLQTU9IPe1C27xMvNoaM+4aM7JB1jPoltJVIPYeqr6rW0Gv8ZqHfd5XhGOhhxTY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1626480000; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To; bh=oJ+ksBPws0IFB6t3oN4tWXkaszK0MFuquO9iDNYnIZ4=; b=djQwbeH2w3PhQ7gFPuOsxUb7wY+rLa1tmODK5EdGIXOdtqhmQ0R1mKEdG+ZyjBB8sQKreeTqpCtZDKPqgwkGDx/ZKuiyRxNKKPJsUKfuj2t2dPELZfPnY1Md27nPc2TbEVwYXFI1y08xoeGyhlHYZWsYPEu+B4ovHprXN3SRHVY= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1626479999994172.8192450562599; Fri, 16 Jul 2021 16:59:59 -0700 (PDT) Received: from list by lists.xenproject.org with outflank-mailman.157774.290609 (Exim 4.92) (envelope-from ) id 1m4Xk7-0005Uf-NY; Fri, 16 Jul 2021 23:59:43 +0000 Received: by outflank-mailman (output) from mailman id 157774.290609; Fri, 16 Jul 2021 23:59:43 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1m4Xk7-0005UY-Kb; Fri, 16 Jul 2021 23:59:43 +0000 Received: by outflank-mailman (input) for mailman id 157774; Fri, 16 Jul 2021 23:59:43 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1m4Xk7-0005UR-9T for xen-devel@lists.xenproject.org; Fri, 16 Jul 2021 23:59:43 +0000 Received: from mail.kernel.org (unknown [198.145.29.99]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id e2f1813a-e691-11eb-89d6-12813bfff9fa; Fri, 16 Jul 2021 23:59:42 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 30B5F611BE; Fri, 16 Jul 2021 23:59:41 +0000 (UTC) X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: e2f1813a-e691-11eb-89d6-12813bfff9fa DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1626479981; bh=NVXFwc826W8ZK0AzWf2EJbfB+haRuWSUP9UYkEvEuYg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ozje3Fvcd9kiNvmaMELFurN5SgrTFG/8ywPOnCYbDAx8fUGzuPWDsMcb4v3RVJT5O RFWtyqezJV4kDQyJjVZxqg3na/ucU4moc4QTlwu2/hxpav/MMSrko7LaryOlZnzb8U t1PRYYzjwx8rgxD8jkje6qM7iGn5lJ84IAfODHQbVxzYCpXDANFqmxAz0JKQMVNf/+ A4XYZw+YgC2IpKyfXeRVt7kmOtJk1odL7wXKET92A8bExE5Q7SqJmFNQJ4bLMNDsCk RKfu70hW6tQt2lRgwwBtKUKks9ui3zZY4w8WN0N9L1BsAI1zRSmjAxYGIkwJMhx8QN jJnHTR8NuMfyQ== From: Stefano Stabellini To: xen-devel@lists.xenproject.org Cc: sstabellini@kernel.org, julien@xen.org, Bertrand.Marquis@arm.com, Volodymyr_Babchuk@epam.com, rahul.singh@arm.com, brian.woods@xilinx.com, Stefano Stabellini Subject: [PATCH v4 1/3] arm,smmu: switch to using iommu_fwspec functions Date: Fri, 16 Jul 2021 16:59:37 -0700 Message-Id: <20210716235939.9585-1-sstabellini@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: X-ZohoMail-DKIM: pass (identity @kernel.org) X-ZM-MESSAGEID: 1626480001706100002 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Brian Woods Modify the smmu driver so that it uses the iommu_fwspec helper functions. This means both ARM IOMMU drivers will both use the iommu_fwspec helper functions, making enabling generic device tree bindings in the SMMU driver much cleaner. Signed-off-by: Brian Woods Signed-off-by: Stefano Stabellini Reviewed-by: Rahul Singh --- Changes in v4: - fix spurious newline - fix a word spelling - reuse existing dev_iommu_fwspec_get check in iommu_add_dt_device instead of adding a new one - get fwspec (dev_iommu_fwspec_get) after calling iommu_fwspec_add_ids, at the fwspec pointer might change --- xen/drivers/passthrough/arm/smmu.c | 75 ++++++++++++++++++--------- xen/drivers/passthrough/device_tree.c | 6 ++- 2 files changed, 56 insertions(+), 25 deletions(-) diff --git a/xen/drivers/passthrough/arm/smmu.c b/xen/drivers/passthrough/a= rm/smmu.c index da2cd457d7..b34f537edd 100644 --- a/xen/drivers/passthrough/arm/smmu.c +++ b/xen/drivers/passthrough/arm/smmu.c @@ -32,6 +32,9 @@ * - 4k and 64k pages, with contiguous pte hints. * - Up to 48-bit addressing (dependent on VA_BITS) * - Context fault reporting + * + * Changes compared to Linux driver: + * - support for fwspec */ =20 =20 @@ -49,6 +52,7 @@ #include #include #include +#include #include =20 /* Xen: The below defines are redefined within the file. Undef it */ @@ -616,13 +620,11 @@ struct arm_smmu_smr { =20 struct arm_smmu_master_cfg { struct arm_smmu_device *smmu; - int num_streamids; - u16 streamids[MAX_MASTER_STREAMIDS]; s16 smendx[MAX_MASTER_STREAMIDS]; }; #define INVALID_SMENDX -1 -#define for_each_cfg_sme(cfg, i, idx) \ - for (i =3D 0; idx =3D cfg->smendx[i], i < cfg->num_streamids; ++i) +#define for_each_cfg_sme(cfg, i, idx, num) \ + for (i =3D 0; idx =3D cfg->smendx[i], i < num; ++i) =20 struct arm_smmu_master { struct device_node *of_node; @@ -712,6 +714,14 @@ static struct arm_smmu_option_prop arm_smmu_options[] = =3D { { 0, NULL}, }; =20 +static inline struct iommu_fwspec * +arm_smmu_get_fwspec(struct arm_smmu_master_cfg *cfg) +{ + struct arm_smmu_master *master =3D container_of(cfg, + struct arm_smmu_master, cfg); + return dev_iommu_fwspec_get(&master->of_node->dev); +} + static void parse_driver_options(struct arm_smmu_device *smmu) { int i =3D 0; @@ -805,8 +815,9 @@ static int register_smmu_master(struct arm_smmu_device = *smmu, struct device *dev, struct of_phandle_args *masterspec) { - int i; + int i, ret =3D 0; struct arm_smmu_master *master; + struct iommu_fwspec *fwspec; =20 master =3D find_smmu_master(smmu, masterspec->np); if (master) { @@ -816,24 +827,30 @@ static int register_smmu_master(struct arm_smmu_devic= e *smmu, return -EBUSY; } =20 - if (masterspec->args_count > MAX_MASTER_STREAMIDS) { - dev_err(dev, - "reached maximum number (%d) of stream IDs for master device %s\n", - MAX_MASTER_STREAMIDS, masterspec->np->name); - return -ENOSPC; - } - master =3D devm_kzalloc(dev, sizeof(*master), GFP_KERNEL); if (!master) return -ENOMEM; + master->of_node =3D masterspec->np; =20 - master->of_node =3D masterspec->np; - master->cfg.num_streamids =3D masterspec->args_count; + ret =3D iommu_fwspec_init(&master->of_node->dev, smmu->dev); + if (ret) { + kfree(master); + return ret; + } + + /* adding the ids here */ + ret =3D iommu_fwspec_add_ids(&masterspec->np->dev, + masterspec->args, + masterspec->args_count); + if (ret) + return ret; + + fwspec =3D dev_iommu_fwspec_get(dev); =20 /* Xen: Let Xen know that the device is protected by an SMMU */ dt_device_set_protected(masterspec->np); =20 - for (i =3D 0; i < master->cfg.num_streamids; ++i) { + for (i =3D 0; i < fwspec->num_ids; ++i) { u16 streamid =3D masterspec->args[i]; =20 if (!(smmu->features & ARM_SMMU_FEAT_STREAM_MATCH) && @@ -843,7 +860,6 @@ static int register_smmu_master(struct arm_smmu_device = *smmu, masterspec->np->name, smmu->num_mapping_groups); return -ERANGE; } - master->cfg.streamids[i] =3D streamid; master->cfg.smendx[i] =3D INVALID_SMENDX; } return insert_smmu_master(smmu, master); @@ -1499,22 +1515,23 @@ static int arm_smmu_master_alloc_smes(struct device= *dev) struct arm_smmu_device *smmu =3D cfg->smmu; struct arm_smmu_smr *smrs =3D smmu->smrs; int i, idx, ret; + struct iommu_fwspec *fwspec =3D arm_smmu_get_fwspec(cfg); =20 spin_lock(&smmu->stream_map_lock); /* Figure out a viable stream map entry allocation */ - for_each_cfg_sme(cfg, i, idx) { + for_each_cfg_sme(cfg, i, idx, fwspec->num_ids) { if (idx !=3D INVALID_SMENDX) { ret =3D -EEXIST; goto out_err; } =20 - ret =3D arm_smmu_find_sme(smmu, cfg->streamids[i], 0); + ret =3D arm_smmu_find_sme(smmu, fwspec->ids[i], 0); if (ret < 0) goto out_err; =20 idx =3D ret; if (smrs && smmu->s2crs[idx].count =3D=3D 0) { - smrs[idx].id =3D cfg->streamids[i]; + smrs[idx].id =3D fwspec->ids[i]; smrs[idx].mask =3D 0; /* We don't currently share SMRs */ smrs[idx].valid =3D true; } @@ -1523,7 +1540,7 @@ static int arm_smmu_master_alloc_smes(struct device *= dev) } =20 /* It worked! Now, poke the actual hardware */ - for_each_cfg_sme(cfg, i, idx) { + for_each_cfg_sme(cfg, i, idx, fwspec->num_ids) { arm_smmu_write_sme(smmu, idx); } =20 @@ -1543,9 +1560,10 @@ static void arm_smmu_master_free_smes(struct arm_smm= u_master_cfg *cfg) { struct arm_smmu_device *smmu =3D cfg->smmu; int i, idx; + struct iommu_fwspec *fwspec =3D arm_smmu_get_fwspec(cfg); =20 spin_lock(&smmu->stream_map_lock); - for_each_cfg_sme(cfg, i, idx) { + for_each_cfg_sme(cfg, i, idx, fwspec->num_ids) { if (arm_smmu_free_sme(smmu, idx)) arm_smmu_write_sme(smmu, idx); cfg->smendx[i] =3D INVALID_SMENDX; @@ -1561,8 +1579,9 @@ static int arm_smmu_domain_add_master(struct arm_smmu= _domain *smmu_domain, enum arm_smmu_s2cr_type type =3D S2CR_TYPE_TRANS; u8 cbndx =3D smmu_domain->cfg.cbndx; int i, idx; + struct iommu_fwspec *fwspec =3D arm_smmu_get_fwspec(cfg); =20 - for_each_cfg_sme(cfg, i, idx) { + for_each_cfg_sme(cfg, i, idx, fwspec->num_ids) { if (type =3D=3D s2cr[idx].type && cbndx =3D=3D s2cr[idx].cbndx) continue; =20 @@ -1961,6 +1980,7 @@ static int arm_smmu_add_device(struct device *dev) struct arm_smmu_master_cfg *cfg; struct iommu_group *group; void (*releasefn)(void *) =3D NULL; + int ret; =20 smmu =3D find_smmu_for_device(dev); if (!smmu) @@ -1968,19 +1988,26 @@ static int arm_smmu_add_device(struct device *dev) =20 if (dev_is_pci(dev)) { struct pci_dev *pdev =3D to_pci_dev(dev); + struct iommu_fwspec *fwspec; =20 cfg =3D kzalloc(sizeof(*cfg), GFP_KERNEL); if (!cfg) { return -ENOMEM; } =20 - cfg->num_streamids =3D 1; + ret =3D iommu_fwspec_init(dev, smmu->dev); + if (ret) { + kfree(cfg); + return ret; + } + fwspec =3D dev_iommu_fwspec_get(dev); + /* * Assume Stream ID =3D=3D Requester ID for now. * We need a way to describe the ID mappings in FDT. */ pci_for_each_dma_alias(pdev, __arm_smmu_get_pci_sid, - &cfg->streamids[0]); + &fwspec->ids[0]); releasefn =3D __arm_smmu_release_pci_iommudata; cfg->smmu =3D smmu; } else { diff --git a/xen/drivers/passthrough/device_tree.c b/xen/drivers/passthroug= h/device_tree.c index 999b831d90..911f82a561 100644 --- a/xen/drivers/passthrough/device_tree.c +++ b/xen/drivers/passthrough/device_tree.c @@ -140,8 +140,12 @@ int iommu_add_dt_device(struct dt_device_node *np) if ( !ops ) return -EINVAL; =20 + /* + * Device already added. It can happen when both iommus and + * mmu-masters are present. + */ if ( dev_iommu_fwspec_get(dev) ) - return -EEXIST; + return 0; =20 /* * According to the Documentation/devicetree/bindings/iommu/iommu.txt --=20 2.17.1 From nobody Fri Nov 29 21:00:48 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass(p=none dis=none) header.from=kernel.org ARC-Seal: i=1; a=rsa-sha256; t=1626480001; cv=none; d=zohomail.com; s=zohoarc; b=a+liYCSDj5LzBncgrgmrcpyVWwgySNMi2T/CLCAyBlpuJ4zrORlvqStlnxgDuebnagoEspuXeYmlnSd2R54vCcyZ+BLQc6FOXqzcfu2fWfQtwLC68K2epvpfxAkxs4zZYKb8S4DB6JDscF1Vl2tmCHEJdMRvwBxfvCE5BakaqPE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1626480001; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To; bh=cTcKHIMLhMEY8cip8B+vjA3mYDm9AO8Ykj1COsmnLK8=; b=bt8aq3V4bgfM5wa5yHc7nJIU6Rjjjd18NIUKtQ7bRmHfZUlS4MpCQNKFPzq1/D9CsWO/oMlnkwFUUg9gLEu9MTqBB2TwPwr0ncK3qlJETrZgSjfjrZRiMXU8sb0sCgqnNs3gSejfk9uukakaxt6sgTm1QFWxU98sfwEmqtjvlp8= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1626480001262562.5813171585362; Fri, 16 Jul 2021 17:00:01 -0700 (PDT) Received: from list by lists.xenproject.org with outflank-mailman.157775.290622 (Exim 4.92) (envelope-from ) id 1m4XkD-0005oE-4V; Fri, 16 Jul 2021 23:59:49 +0000 Received: by outflank-mailman (output) from mailman id 157775.290622; Fri, 16 Jul 2021 23:59:49 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1m4XkD-0005o1-0g; Fri, 16 Jul 2021 23:59:49 +0000 Received: by outflank-mailman (input) for mailman id 157775; Fri, 16 Jul 2021 23:59:48 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1m4XkC-0005UR-79 for xen-devel@lists.xenproject.org; Fri, 16 Jul 2021 23:59:48 +0000 Received: from mail.kernel.org (unknown [198.145.29.99]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id e2f1813b-e691-11eb-89d6-12813bfff9fa; Fri, 16 Jul 2021 23:59:42 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id A0B38613CF; Fri, 16 Jul 2021 23:59:41 +0000 (UTC) X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: e2f1813b-e691-11eb-89d6-12813bfff9fa DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1626479981; bh=iFb2HLUbXXrCu1ym6b/VM2NRQI2fEFfRz7BJes86IfY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=B9Q8ZW6J0WWZ87mEuWZbRuxQOaCJgOPohqhU22kwRh0irWP/HMrUmjAXaDSTnHCu3 TrjgmBJ5OCvSQqiWY4Slh7ThP6rFrt3JEhB7YM4KL8vDIB2yRDGy3S6EcOg8B3rjWw 6a/mxAL4fap6tfPKLEW+kVRYAU+GSC/ufKKCNe0Kg8oIWVr137SdGV9XtNvvGeo5/P 87FEFOZ+umDCEIBGrm1MsMSJ/M9EAtDGT9hJI2AD3p7PlC06E53keubzKvKKVNSv17 eLzxyQybj1mX1cT090DokV2PIrmad1KYVkgR+WEGLibWLLDNTMRMMNoJR7ksES7h0g fAAfqAHT36i8A== From: Stefano Stabellini To: xen-devel@lists.xenproject.org Cc: sstabellini@kernel.org, julien@xen.org, Bertrand.Marquis@arm.com, Volodymyr_Babchuk@epam.com, rahul.singh@arm.com, brian.woods@xilinx.com, Stefano Stabellini Subject: [PATCH 2/3] arm,smmu: restructure code in preparation to new bindings support Date: Fri, 16 Jul 2021 16:59:38 -0700 Message-Id: <20210716235939.9585-2-sstabellini@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: X-ZohoMail-DKIM: pass (identity @kernel.org) X-ZM-MESSAGEID: 1626480903969100001 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Brian Woods Restructure some of the code and add supporting functions for adding generic device tree (DT) binding support. This will allow for using current Linux device trees with just modifying the chosen field to enable Xen. Signed-off-by: Brian Woods Signed-off-by: Stefano Stabellini Reviewed-by: Rahul Singh Acked-by: Julien Grall --- xen/drivers/passthrough/arm/smmu.c | 62 ++++++++++++++++-------------- 1 file changed, 34 insertions(+), 28 deletions(-) diff --git a/xen/drivers/passthrough/arm/smmu.c b/xen/drivers/passthrough/a= rm/smmu.c index b34f537edd..252e8c1680 100644 --- a/xen/drivers/passthrough/arm/smmu.c +++ b/xen/drivers/passthrough/arm/smmu.c @@ -811,53 +811,36 @@ static int insert_smmu_master(struct arm_smmu_device = *smmu, return 0; } =20 -static int register_smmu_master(struct arm_smmu_device *smmu, - struct device *dev, - struct of_phandle_args *masterspec) +static int arm_smmu_dt_add_device_legacy(struct arm_smmu_device *smmu, + struct device *dev, + struct iommu_fwspec *fwspec) { - int i, ret =3D 0; + int i; struct arm_smmu_master *master; - struct iommu_fwspec *fwspec; + struct device_node *dev_node =3D dev_get_dev_node(dev); =20 - master =3D find_smmu_master(smmu, masterspec->np); + master =3D find_smmu_master(smmu, dev_node); if (master) { dev_err(dev, "rejecting multiple registrations for master device %s\n", - masterspec->np->name); + dev_node->name); return -EBUSY; } =20 master =3D devm_kzalloc(dev, sizeof(*master), GFP_KERNEL); if (!master) return -ENOMEM; - master->of_node =3D masterspec->np; - - ret =3D iommu_fwspec_init(&master->of_node->dev, smmu->dev); - if (ret) { - kfree(master); - return ret; - } - - /* adding the ids here */ - ret =3D iommu_fwspec_add_ids(&masterspec->np->dev, - masterspec->args, - masterspec->args_count); - if (ret) - return ret; - - fwspec =3D dev_iommu_fwspec_get(dev); + master->of_node =3D dev_node; =20 /* Xen: Let Xen know that the device is protected by an SMMU */ - dt_device_set_protected(masterspec->np); + dt_device_set_protected(dev_node); =20 for (i =3D 0; i < fwspec->num_ids; ++i) { - u16 streamid =3D masterspec->args[i]; - if (!(smmu->features & ARM_SMMU_FEAT_STREAM_MATCH) && - (streamid >=3D smmu->num_mapping_groups)) { + (fwspec->ids[i] >=3D smmu->num_mapping_groups)) { dev_err(dev, "stream ID for master device %s greater than maximum allowed (%d)\n", - masterspec->np->name, smmu->num_mapping_groups); + dev_node->name, smmu->num_mapping_groups); return -ERANGE; } master->cfg.smendx[i] =3D INVALID_SMENDX; @@ -865,6 +848,29 @@ static int register_smmu_master(struct arm_smmu_device= *smmu, return insert_smmu_master(smmu, master); } =20 +static int register_smmu_master(struct arm_smmu_device *smmu, + struct device *dev, + struct of_phandle_args *masterspec) +{ + int ret =3D 0; + struct iommu_fwspec *fwspec; + + ret =3D iommu_fwspec_init(&masterspec->np->dev, smmu->dev); + if (ret) + return ret; + + ret =3D iommu_fwspec_add_ids(&masterspec->np->dev, + masterspec->args, + masterspec->args_count); + if (ret) + return ret; + + fwspec =3D dev_iommu_fwspec_get(&masterspec->np->dev); + return arm_smmu_dt_add_device_legacy(smmu, + &masterspec->np->dev, + fwspec); +} + static struct arm_smmu_device *find_smmu_for_device(struct device *dev) { struct arm_smmu_device *smmu; --=20 2.17.1 From nobody Fri Nov 29 21:00:48 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; 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Fri, 16 Jul 2021 23:59:53 +0000 Received: from mail.kernel.org (unknown [198.145.29.99]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id e332387f-e691-11eb-89d6-12813bfff9fa; Fri, 16 Jul 2021 23:59:43 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 10693613EB; Fri, 16 Jul 2021 23:59:42 +0000 (UTC) X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: e332387f-e691-11eb-89d6-12813bfff9fa DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1626479982; bh=2MBU5ETcjLteRXEbHq+jcdNpdKh1pLz2CWkq2mFGPXc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aVMYXakvjDTTuMOKoVKtItVnqBVWkAfWzFfoPNdV4HAI8ZffcqoDSOG5lz+S0SXi/ lhWLVYiNXkBKlzMLxDD6gJ9TwKJLA+3LuSYmd77rdiUhYRQJFOoJpT8uAEAXzGrLXg WfRFbLxgM0Fk2vvU4D99hFgGS5WyGDpk8MNgZ+0Lu+ow38y+FZZunXiyPtdg1C9SFy wbzmpw0Kh9ZMzsqqIgbT86xwY1xusvsGR37piMp4Z257RL1AAyfE0ABJb/uYn9WtbE h6Wqlw1mrRE8aBEdqqK02okLKeG7rxD/94DXytYyJCiI0cLgMT3SMvudsI8z0wt+p5 wqWzh9HI31BSQ== From: Stefano Stabellini To: xen-devel@lists.xenproject.org Cc: sstabellini@kernel.org, julien@xen.org, Bertrand.Marquis@arm.com, Volodymyr_Babchuk@epam.com, rahul.singh@arm.com, brian.woods@xilinx.com, Stefano Stabellini Subject: [PATCH v4 3/3] arm,smmu: add support for generic DT bindings. Implement add_device and dt_xlate. Date: Fri, 16 Jul 2021 16:59:39 -0700 Message-Id: <20210716235939.9585-3-sstabellini@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: X-ZohoMail-DKIM: pass (identity @kernel.org) X-ZM-MESSAGEID: 1626480012531100001 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Brian Woods For the legacy path, arm_smmu_dt_add_device_legacy is called by register_smmu_master scanning mmu-masters (a fwspec entry is also created.) For the generic path, arm_smmu_dt_add_device_generic gets called instead. Then, arm_smmu_dt_add_device_generic calls arm_smmu_dt_add_device_legacy afterwards, shared with the legacy path. This way most of the low level implementation is shared between the two paths. If both legacy bindings and generic bindings are present in device tree, the legacy bindings are the ones that are used. That's because mmu-masters is parsed by xen/drivers/passthrough/arm/smmu.c:arm_smmu_device_dt_probe which is called by arm_smmu_dt_init. It happens very early. iommus is parsed by xen/drivers/passthrough/device_tree.c:iommu_add_dt_device which is called by xen/arch/arm/domain_build.c:handle_device and happens afterwards. arm_smmu_dt_xlate_generic is a verbatim copy from Linux (drivers/iommu/arm/arm-smmu/arm-smmu.c:arm_smmu_of_xlate, version v5.10). A workaround was introduced by cf4af9d6d6c (xen/arm: boot with device trees with "mmu-masters" and "iommus") because the SMMU driver only supported the legacy bindings. Remove it now. Signed-off-by: Brian Woods Signed-off-by: Stefano Stabellini Reviewed-by: Rahul Singh Acked-by: Julien Grall --- Changes in v4: - improve indentation - improve commit message --- xen/drivers/passthrough/arm/smmu.c | 40 ++++++++++++++++++++++++++- xen/drivers/passthrough/device_tree.c | 17 +----------- 2 files changed, 40 insertions(+), 17 deletions(-) diff --git a/xen/drivers/passthrough/arm/smmu.c b/xen/drivers/passthrough/a= rm/smmu.c index 252e8c1680..a065ba3f4e 100644 --- a/xen/drivers/passthrough/arm/smmu.c +++ b/xen/drivers/passthrough/arm/smmu.c @@ -255,6 +255,8 @@ struct iommu_group atomic_t ref; }; =20 +static struct arm_smmu_device *find_smmu(const struct device *dev); + static struct iommu_group *iommu_group_alloc(void) { struct iommu_group *group =3D xzalloc(struct iommu_group); @@ -443,6 +445,8 @@ static struct iommu_group *iommu_group_get(struct devic= e *dev) #define SMR_VALID (1U << 31) #define SMR_MASK_SHIFT 16 #define SMR_ID_SHIFT 0 +#define SMR_ID_MASK 0x7fff +#define SMR_MASK_MASK 0x7fff =20 #define ARM_SMMU_GR0_S2CR(n) (0xc00 + ((n) << 2)) #define S2CR_CBNDX_SHIFT 0 @@ -871,6 +875,38 @@ static int register_smmu_master(struct arm_smmu_device= *smmu, fwspec); } =20 +static int arm_smmu_dt_add_device_generic(u8 devfn, struct device *dev) +{ + struct arm_smmu_device *smmu; + struct iommu_fwspec *fwspec; + + fwspec =3D dev_iommu_fwspec_get(dev); + if (fwspec =3D=3D NULL) + return -ENXIO; + + smmu =3D find_smmu(fwspec->iommu_dev); + if (smmu =3D=3D NULL) + return -ENXIO; + + return arm_smmu_dt_add_device_legacy(smmu, dev, fwspec); +} + +static int arm_smmu_dt_xlate_generic(struct device *dev, + const struct dt_phandle_args *spec) +{ + uint32_t mask, fwid =3D 0; + + if (spec->args_count > 0) + fwid |=3D (SMR_ID_MASK & spec->args[0]) << SMR_ID_SHIFT; + + if (spec->args_count > 1) + fwid |=3D (SMR_MASK_MASK & spec->args[1]) << SMR_MASK_SHIFT; + else if (!of_property_read_u32(spec->np, "stream-match-mask", &mask)) + fwid |=3D (SMR_MASK_MASK & mask) << SMR_MASK_SHIFT; + + return iommu_fwspec_add_ids(dev, &fwid, 1); +} + static struct arm_smmu_device *find_smmu_for_device(struct device *dev) { struct arm_smmu_device *smmu; @@ -2835,6 +2871,7 @@ static void arm_smmu_iommu_domain_teardown(struct dom= ain *d) static const struct iommu_ops arm_smmu_iommu_ops =3D { .init =3D arm_smmu_iommu_domain_init, .hwdom_init =3D arm_smmu_iommu_hwdom_init, + .add_device =3D arm_smmu_dt_add_device_generic, .teardown =3D arm_smmu_iommu_domain_teardown, .iotlb_flush =3D arm_smmu_iotlb_flush, .iotlb_flush_all =3D arm_smmu_iotlb_flush_all, @@ -2842,9 +2879,10 @@ static const struct iommu_ops arm_smmu_iommu_ops =3D= { .reassign_device =3D arm_smmu_reassign_dev, .map_page =3D arm_iommu_map_page, .unmap_page =3D arm_iommu_unmap_page, + .dt_xlate =3D arm_smmu_dt_xlate_generic, }; =20 -static __init const struct arm_smmu_device *find_smmu(const struct device = *dev) +static struct arm_smmu_device *find_smmu(const struct device *dev) { struct arm_smmu_device *smmu; bool found =3D false; diff --git a/xen/drivers/passthrough/device_tree.c b/xen/drivers/passthroug= h/device_tree.c index 911f82a561..af6c2b2dfe 100644 --- a/xen/drivers/passthrough/device_tree.c +++ b/xen/drivers/passthrough/device_tree.c @@ -159,22 +159,7 @@ int iommu_add_dt_device(struct dt_device_node *np) * these callback implemented. */ if ( !ops->add_device || !ops->dt_xlate ) - { - /* - * Some Device Trees may expose both legacy SMMU and generic - * IOMMU bindings together. However, the SMMU driver is only - * supporting the former and will protect them during the - * initialization. So we need to skip them and not return - * error here. - * - * XXX: This can be dropped when the SMMU is able to deal - * with generic bindings. - */ - if ( dt_device_is_protected(np) ) - return 0; - else - return -EINVAL; - } + return -EINVAL; =20 if ( !dt_device_is_available(iommu_spec.np) ) break; --=20 2.17.1