From patchwork Wed Jun 2 15:44:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Philippe Brucker X-Patchwork-Id: 452534 Delivered-To: patch@linaro.org Received: by 2002:a02:c735:0:0:0:0:0 with SMTP id h21csp695565jao; Wed, 2 Jun 2021 08:55:27 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzBwoJauW7Znxi/1AEhrYN4W7HA66d/A/XyX/pS6oSxXW3Bl3+eU3TVJKSt8Nrx+y9Eyh+G X-Received: by 2002:a17:906:2510:: with SMTP id i16mr13450610ejb.218.1622649327193; Wed, 02 Jun 2021 08:55:27 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1622649327; cv=none; d=google.com; s=arc-20160816; b=fBJ3eFvoTrMxNoj0CaQPj4KHVN3NXWmAozkMBWXotBOiTfJYXh51s7+91gppP8qYQs dtpQZL14y6UU+r0EJFHyEkra8TcaCD9PTANzNRgS50iU29hKvG10Hc+w7PToc+p9zBn2 sw3pfD9szQICinG+0Nl1DokDfR/WXj2FzfIKKnu2QBWXNcNHhwEy0ExsEWrZMh60dbsM I5kqTVEEbLf0d1mLto7IAc5dkYsMkNj4ylbZ7WNcBQmOVVAVe/aYIQVTtC1pLeiHHji4 T/PUfkaA4LPaaohwl6y91e6vTlIC7f8EClpcv+eYftB5I/zpywpHPKnHUkpNzi7Flro9 whxQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=rcZqp7kiQKPtioIYYmePxJZ8jRjqdm9ovqpRz8DAQNM=; b=1DkELgb9uwifPlzvm2lox1a0kUh3OJqlDapESrHrU9VS7qNBE0fOnEyxutika2vBcS z3CGtz2OIjlneT73WoW9gBD5k3Rcq/R7iQdWity71rv8nQQgG5edzixvXua/Jl3BRRyt Zit6bJ/8e2sNJ+HlRJK/Zf84Xw3kVk69NsoHCn/PVtuC+wjxm0LBMazrLfsfuj3fGkB+ wiepjHMYNbKp7bjp7VSvC6jZXDlZ98x9Fau/PFsfj/rqd87Pi2RD+WxMZF2ZO4YMZIMs D182Z7geT2Sw32ZnGcNwO+vQMmiST82bUSd5/BZoKIcDpwIwBkpAVXlWFN2c+0SaMtYG MJSQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=GGijrFXc; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id 13si185395ejh.524.2021.06.02.08.55.27; Wed, 02 Jun 2021 08:55:27 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=GGijrFXc; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231946AbhFBP5I (ORCPT + 4 others); Wed, 2 Jun 2021 11:57:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58458 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232065AbhFBP5G (ORCPT ); Wed, 2 Jun 2021 11:57:06 -0400 Received: from mail-ej1-x633.google.com (mail-ej1-x633.google.com [IPv6:2a00:1450:4864:20::633]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D76DFC061574 for ; Wed, 2 Jun 2021 08:55:09 -0700 (PDT) Received: by mail-ej1-x633.google.com with SMTP id k7so4536264ejv.12 for ; Wed, 02 Jun 2021 08:55:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=rcZqp7kiQKPtioIYYmePxJZ8jRjqdm9ovqpRz8DAQNM=; b=GGijrFXc+HpSE9WoeOpBAm3mX9yf2YsAm4HFWzomjBMECg8vMuWrBnJJuRwkgjGdOz rmerVt4RbeC+7JFC6zNSMASgwdGIgq/FdKsDNaNzekPpg7V2o/iDiWEVS4u0Kbh2mz1o TjFNsrCBiz0dezcDqyzlOQ1roB0s4vk35pO1BuFCvrC4bsNRVUHlJRPBOCvnfvlqJUTc FRqFUdZBXUSueL8CNsyLB9eD9AP64x6+irapuCeyhxmMmDnTtrpNRFpIoKFwH8vbzRu4 llijmwWT0wmotHWX5Z8aP+AbRPYIXeuKCk/l8/gTBE/xpGyQ6/6pdx6TiIzUxIYcKpB/ Jn7Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=rcZqp7kiQKPtioIYYmePxJZ8jRjqdm9ovqpRz8DAQNM=; b=URoOEFa0ssUAxJamTwZrFF2X1LniLCpgiTlZa2TbrRm/f3HYTXGsHglSDzcxv2lDvf Z/Jt4l5Dhp6dUxZIZkbc3ItaTFk3QzTRmEhWsdWdNFlMQj6upFy3KMsxZOr3y+wYTg52 FLIVNqbFGHZAKA2a5TJLPjxyNo1/u/UoUror4+4uv0UxDNLCWHmmJMmCfU5aCTWqoCjW f6ZGNJdcTCIkNwaRq6oFpYvfUP5Ej5L4BQtU3x/iUs3jrS7rSBUgc6QbpnLN5KBpIACw 70cQYL6bb4AZ2ZTQ03943l5HGKtu/sIFbxTW5ugSKZ2rO8altpWd2ienwI6H9bHZuWQn RA8Q== X-Gm-Message-State: AOAM531gWypnUaWaF/3FrpPm7nAwsLJW5wKnoHrD6LMYbdaIhgoQweZl pporHgCOdFeAQ71K7rNxw02pQA== X-Received: by 2002:a17:906:4e95:: with SMTP id v21mr20387922eju.434.1622649308415; Wed, 02 Jun 2021 08:55:08 -0700 (PDT) Received: from localhost.localdomain (adsl-84-226-111-173.adslplus.ch. [84.226.111.173]) by smtp.gmail.com with ESMTPSA id d24sm174249edr.95.2021.06.02.08.55.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Jun 2021 08:55:07 -0700 (PDT) From: Jean-Philippe Brucker To: rjw@rjwysocki.net, lenb@kernel.org, joro@8bytes.org, mst@redhat.com Cc: will@kernel.org, catalin.marinas@arm.com, baolu.lu@linux.intel.com, dwmw2@infradead.org, linux-acpi@vger.kernel.org, iommu@lists.linux-foundation.org, virtualization@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, eric.auger@redhat.com, sebastien.boeuf@intel.com, robin.murphy@arm.com, kevin.tian@intel.com, lorenzo.pieralisi@arm.com, guohanjun@huawei.com, sudeep.holla@arm.com, jean-philippe@linaro.org Subject: [PATCH v3 2/6] ACPI: Move IOMMU setup code out of IORT Date: Wed, 2 Jun 2021 17:44:42 +0200 Message-Id: <20210602154444.1077006-3-jean-philippe@linaro.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210602154444.1077006-1-jean-philippe@linaro.org> References: <20210602154444.1077006-1-jean-philippe@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Extract the code that sets up the IOMMU infrastructure from IORT, since it can be reused by VIOT. Move it one level up into a new acpi_iommu_configure_id() function, which calls the IORT parsing function which in turn calls the acpi_iommu_fwspec_init() helper. Signed-off-by: Jean-Philippe Brucker --- include/acpi/acpi_bus.h | 3 ++ include/linux/acpi_iort.h | 8 ++--- drivers/acpi/arm64/iort.c | 75 +++++---------------------------------- drivers/acpi/scan.c | 55 +++++++++++++++++++++++++++- 4 files changed, 69 insertions(+), 72 deletions(-) -- 2.31.1 Reported-by: kernel test robot diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 3a82faac5767..41f092a269f6 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -588,6 +588,9 @@ struct acpi_pci_root { bool acpi_dma_supported(struct acpi_device *adev); enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev); +int acpi_iommu_fwspec_init(struct device *dev, u32 id, + struct fwnode_handle *fwnode, + const struct iommu_ops *ops); int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset, u64 *size); int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h index f7f054833afd..f1f0842a2cb2 100644 --- a/include/linux/acpi_iort.h +++ b/include/linux/acpi_iort.h @@ -35,8 +35,7 @@ void acpi_configure_pmsi_domain(struct device *dev); int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id); /* IOMMU interface */ int iort_dma_get_ranges(struct device *dev, u64 *size); -const struct iommu_ops *iort_iommu_configure_id(struct device *dev, - const u32 *id_in); +int iort_iommu_configure_id(struct device *dev, const u32 *id_in); int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head); phys_addr_t acpi_iort_dma_get_max_cpu_address(void); #else @@ -50,9 +49,8 @@ static inline void acpi_configure_pmsi_domain(struct device *dev) { } /* IOMMU interface */ static inline int iort_dma_get_ranges(struct device *dev, u64 *size) { return -ENODEV; } -static inline const struct iommu_ops *iort_iommu_configure_id( - struct device *dev, const u32 *id_in) -{ return NULL; } +static inline int iort_iommu_configure_id(struct device *dev, const u32 *id_in) +{ return -ENODEV; } static inline int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) { return 0; } diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index a940be1cf2af..b5b021e064b6 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -806,23 +806,6 @@ static struct acpi_iort_node *iort_get_msi_resv_iommu(struct device *dev) return NULL; } -static inline const struct iommu_ops *iort_fwspec_iommu_ops(struct device *dev) -{ - struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); - - return (fwspec && fwspec->ops) ? fwspec->ops : NULL; -} - -static inline int iort_add_device_replay(struct device *dev) -{ - int err = 0; - - if (dev->bus && !device_iommu_mapped(dev)) - err = iommu_probe_device(dev); - - return err; -} - /** * iort_iommu_msi_get_resv_regions - Reserved region driver helper * @dev: Device from iommu_get_resv_regions() @@ -900,18 +883,6 @@ static inline bool iort_iommu_driver_enabled(u8 type) } } -static int arm_smmu_iort_xlate(struct device *dev, u32 streamid, - struct fwnode_handle *fwnode, - const struct iommu_ops *ops) -{ - int ret = iommu_fwspec_init(dev, fwnode, ops); - - if (!ret) - ret = iommu_fwspec_add_ids(dev, &streamid, 1); - - return ret; -} - static bool iort_pci_rc_supports_ats(struct acpi_iort_node *node) { struct acpi_iort_root_complex *pci_rc; @@ -946,7 +917,7 @@ static int iort_iommu_xlate(struct device *dev, struct acpi_iort_node *node, return iort_iommu_driver_enabled(node->type) ? -EPROBE_DEFER : -ENODEV; - return arm_smmu_iort_xlate(dev, streamid, iort_fwnode, ops); + return acpi_iommu_fwspec_init(dev, streamid, iort_fwnode, ops); } struct iort_pci_alias_info { @@ -1020,24 +991,14 @@ static int iort_nc_iommu_map_id(struct device *dev, * @dev: device to configure * @id_in: optional input id const value pointer * - * Returns: iommu_ops pointer on configuration success - * NULL on configuration failure + * Returns: 0 on success, <0 on failure */ -const struct iommu_ops *iort_iommu_configure_id(struct device *dev, - const u32 *id_in) +int iort_iommu_configure_id(struct device *dev, const u32 *id_in) { struct acpi_iort_node *node; - const struct iommu_ops *ops; + const struct iommu_ops *ops = NULL; int err = -ENODEV; - /* - * If we already translated the fwspec there - * is nothing left to do, return the iommu_ops. - */ - ops = iort_fwspec_iommu_ops(dev); - if (ops) - return ops; - if (dev_is_pci(dev)) { struct iommu_fwspec *fwspec; struct pci_bus *bus = to_pci_dev(dev)->bus; @@ -1046,7 +1007,7 @@ const struct iommu_ops *iort_iommu_configure_id(struct device *dev, node = iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX, iort_match_node_callback, &bus->dev); if (!node) - return NULL; + return -ENODEV; info.node = node; err = pci_for_each_dma_alias(to_pci_dev(dev), @@ -1059,7 +1020,7 @@ const struct iommu_ops *iort_iommu_configure_id(struct device *dev, node = iort_scan_node(ACPI_IORT_NODE_NAMED_COMPONENT, iort_match_node_callback, dev); if (!node) - return NULL; + return -ENODEV; err = id_in ? iort_nc_iommu_map_id(dev, node, id_in) : iort_nc_iommu_map(dev, node); @@ -1068,32 +1029,14 @@ const struct iommu_ops *iort_iommu_configure_id(struct device *dev, iort_named_component_init(dev, node); } - /* - * If we have reason to believe the IOMMU driver missed the initial - * add_device callback for dev, replay it to get things in order. - */ - if (!err) { - ops = iort_fwspec_iommu_ops(dev); - err = iort_add_device_replay(dev); - } - - /* Ignore all other errors apart from EPROBE_DEFER */ - if (err == -EPROBE_DEFER) { - ops = ERR_PTR(err); - } else if (err) { - dev_dbg(dev, "Adding to IOMMU failed: %d\n", err); - ops = NULL; - } - - return ops; + return err; } #else int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) { return 0; } -const struct iommu_ops *iort_iommu_configure_id(struct device *dev, - const u32 *input_id) -{ return NULL; } +int iort_iommu_configure_id(struct device *dev, const u32 *input_id) +{ return -ENODEV; } #endif static int nc_dma_get_range(struct device *dev, u64 *size) diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index ea613df8f913..696b81432ae7 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -1520,6 +1521,58 @@ int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset, return ret >= 0 ? 0 : ret; } +int acpi_iommu_fwspec_init(struct device *dev, u32 id, + struct fwnode_handle *fwnode, + const struct iommu_ops *ops) +{ + int ret = iommu_fwspec_init(dev, fwnode, ops); + + if (!ret) + ret = iommu_fwspec_add_ids(dev, &id, 1); + + return ret; +} + +static inline const struct iommu_ops *acpi_iommu_fwspec_ops(struct device *dev) +{ + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); + + return fwspec ? fwspec->ops : NULL; +} + +static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, + const u32 *id_in) +{ + int err; + const struct iommu_ops *ops; + + /* + * If we already translated the fwspec there is nothing left to do, + * return the iommu_ops. + */ + ops = acpi_iommu_fwspec_ops(dev); + if (ops) + return ops; + + err = iort_iommu_configure_id(dev, id_in); + + /* + * If we have reason to believe the IOMMU driver missed the initial + * add_device callback for dev, replay it to get things in order. + */ + if (!err && dev->bus && !device_iommu_mapped(dev)) + err = iommu_probe_device(dev); + + /* Ignore all other errors apart from EPROBE_DEFER */ + if (err == -EPROBE_DEFER) { + return ERR_PTR(err); + } else if (err) { + dev_dbg(dev, "Adding to IOMMU failed: %d\n", err); + return NULL; + } + return acpi_iommu_fwspec_ops(dev); +} + /** * acpi_dma_configure_id - Set-up DMA configuration for the device. * @dev: The pointer to the device @@ -1539,7 +1592,7 @@ int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, acpi_arch_dma_setup(dev, &dma_addr, &size); - iommu = iort_iommu_configure_id(dev, input_id); + iommu = acpi_iommu_configure_id(dev, input_id); if (PTR_ERR(iommu) == -EPROBE_DEFER) return -EPROBE_DEFER;