From patchwork Tue Mar 2 09:26:43 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: 12111461 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 28601C4332D for ; Tue, 2 Mar 2021 11:22:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5109664F23 for ; Tue, 2 Mar 2021 11:22:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1446524AbhCBLRv (ORCPT ); Tue, 2 Mar 2021 06:17:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59934 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1379060AbhCBJjH (ORCPT ); Tue, 2 Mar 2021 04:39:07 -0500 Received: from mail-wm1-x32a.google.com (mail-wm1-x32a.google.com [IPv6:2a00:1450:4864:20::32a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 65D04C061221 for ; Tue, 2 Mar 2021 01:35:39 -0800 (PST) Received: by mail-wm1-x32a.google.com with SMTP id n22so1633285wmc.2 for ; Tue, 02 Mar 2021 01:35:39 -0800 (PST) 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=3TtdFOCenqYX/119xjy/PrrLZWKgY2fUwAevbhJepwI=; b=zfu0A9Ny7ledBeBa93KOT4QZv5DMfxQKAJFp1O5VY0W4OZyhF1LFyqA843M5noop99 eoagFsOb23G53tnAbYInygMwAgJhjH09LAfIizP2g7sHQyexGNUmzHa+rFC8Q6Txx8cc grXZDsdRS7dpHaMA4WGlkS/LODxYVsb2EjU19r+oXgXr4ALyJ+O3j71DrdU+FzoxK51S rEP4r03x7z/oiXDwO/Wi7DvPfxOV9ADaOnqL5ANppu2SwnAAX6BmPq7118eXVaG/qJAq v2wfYozsSoJnziTXQHTwYDxMGbz7YhdNu/elQcW74zMjkhPcoDNvgJct09li3hbDcXEv mBNQ== 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=3TtdFOCenqYX/119xjy/PrrLZWKgY2fUwAevbhJepwI=; b=kZzecJfEkuPgyQxp5wFO0EM8OvXjcvrErZayTw4i5AMePVNKuuUXeZuPsvGR7AEQ/Z nJM9Ci9gngYHVN41QM9dRZriqiDCzdCnkp7o/B7CjrtxmbMtNimlGdi5IEFJ2JEDz+Za EmQugfQGqpm19JEdaTeJee76F+R8NqBJfpeBUQUl7HvLyJWjlfzQTaeA6wI5GRUpi8yn TDXEYvd8hZrYLHyXegukD4pUk4pUaaoM5V7zdEeBIsMeRNH+B87FRnkWIcjxxpvdZUNa RO/KzzPMWsttoF26XzLDRVlVojCF1m4lcMwA6xqdJuXgAFT+5OUGlPnU8NxEgJq0htTx N23Q== X-Gm-Message-State: AOAM532vJyGv/hcFNAlQHr8Kfqwu3IKkH6lEDrV5JRCjXvb7e6t7FSTk 8nJZ/fN5cDZFJGmv/rmjVwv2KA== X-Google-Smtp-Source: ABdhPJzY7S8gk936peaMII9wgaYVxlhJLUsmzmQwNhf/VQ7yfv6hHpi5c06vdDJpT6cWcVDWCum9yw== X-Received: by 2002:a1c:6a12:: with SMTP id f18mr3164429wmc.31.1614677738149; Tue, 02 Mar 2021 01:35:38 -0800 (PST) Received: from localhost.localdomain ([2001:1715:4e26:a7e0:116c:c27a:3e7f:5eaf]) by smtp.gmail.com with ESMTPSA id w131sm1963818wmb.8.2021.03.02.01.35.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Mar 2021 01:35:37 -0800 (PST) From: Jean-Philippe Brucker To: joro@8bytes.org, will@kernel.org Cc: lorenzo.pieralisi@arm.com, robh+dt@kernel.org, guohanjun@huawei.com, sudeep.holla@arm.com, rjw@rjwysocki.net, lenb@kernel.org, robin.murphy@arm.com, Jonathan.Cameron@huawei.com, eric.auger@redhat.com, iommu@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-accelerators@lists.ozlabs.org, baolu.lu@linux.intel.com, jacob.jun.pan@linux.intel.com, kevin.tian@intel.com, vdumpa@nvidia.com, zhangfei.gao@linaro.org, shameerali.kolothum.thodi@huawei.com, vivek.gautam@arm.com, zhukeqian1@huawei.com, wangzhou1@hisilicon.com, Jean-Philippe Brucker Subject: [PATCH v13 07/10] iommu/arm-smmu-v3: Maintain a SID->device structure Date: Tue, 2 Mar 2021 10:26:43 +0100 Message-Id: <20210302092644.2553014-8-jean-philippe@linaro.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210302092644.2553014-1-jean-philippe@linaro.org> References: <20210302092644.2553014-1-jean-philippe@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org When handling faults from the event or PRI queue, we need to find the struct device associated with a SID. Add a rb_tree to keep track of SIDs. Acked-by: Jonathan Cameron Reviewed-by: Eric Auger Signed-off-by: Jean-Philippe Brucker Reviewed-by: Keqian Zhu --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 13 +- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 157 ++++++++++++++++---- 2 files changed, 140 insertions(+), 30 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h index f985817c967a..7b15b7580c6e 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h @@ -639,6 +639,15 @@ struct arm_smmu_device { /* IOMMU core code handle */ struct iommu_device iommu; + + struct rb_root streams; + struct mutex streams_mutex; +}; + +struct arm_smmu_stream { + u32 id; + struct arm_smmu_master *master; + struct rb_node node; }; /* SMMU private data for each master */ @@ -647,8 +656,8 @@ struct arm_smmu_master { struct device *dev; struct arm_smmu_domain *domain; struct list_head domain_head; - u32 *sids; - unsigned int num_sids; + struct arm_smmu_stream *streams; + unsigned int num_streams; bool ats_enabled; bool sva_enabled; struct list_head bonds; 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 7edce914c45e..d148bb6d4289 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -909,8 +909,8 @@ static void arm_smmu_sync_cd(struct arm_smmu_domain *smmu_domain, spin_lock_irqsave(&smmu_domain->devices_lock, flags); list_for_each_entry(master, &smmu_domain->devices, domain_head) { - for (i = 0; i < master->num_sids; i++) { - cmd.cfgi.sid = master->sids[i]; + for (i = 0; i < master->num_streams; i++) { + cmd.cfgi.sid = master->streams[i].id; arm_smmu_cmdq_batch_add(smmu, &cmds, &cmd); } } @@ -1355,6 +1355,28 @@ static int arm_smmu_init_l2_strtab(struct arm_smmu_device *smmu, u32 sid) return 0; } +/* smmu->streams_mutex must be held */ +__maybe_unused +static struct arm_smmu_master * +arm_smmu_find_master(struct arm_smmu_device *smmu, u32 sid) +{ + struct rb_node *node; + struct arm_smmu_stream *stream; + + node = smmu->streams.rb_node; + while (node) { + stream = rb_entry(node, struct arm_smmu_stream, node); + if (stream->id < sid) + node = node->rb_right; + else if (stream->id > sid) + node = node->rb_left; + else + return stream->master; + } + + return NULL; +} + /* IRQ and event handlers */ static irqreturn_t arm_smmu_evtq_thread(int irq, void *dev) { @@ -1588,8 +1610,8 @@ static int arm_smmu_atc_inv_master(struct arm_smmu_master *master) arm_smmu_atc_inv_to_cmd(0, 0, 0, &cmd); - for (i = 0; i < master->num_sids; i++) { - cmd.atc.sid = master->sids[i]; + for (i = 0; i < master->num_streams; i++) { + cmd.atc.sid = master->streams[i].id; arm_smmu_cmdq_issue_cmd(master->smmu, &cmd); } @@ -1632,8 +1654,8 @@ int arm_smmu_atc_inv_domain(struct arm_smmu_domain *smmu_domain, int ssid, if (!master->ats_enabled) continue; - for (i = 0; i < master->num_sids; i++) { - cmd.atc.sid = master->sids[i]; + for (i = 0; i < master->num_streams; i++) { + cmd.atc.sid = master->streams[i].id; arm_smmu_cmdq_batch_add(smmu_domain->smmu, &cmds, &cmd); } } @@ -2065,13 +2087,13 @@ static void arm_smmu_install_ste_for_dev(struct arm_smmu_master *master) int i, j; struct arm_smmu_device *smmu = master->smmu; - for (i = 0; i < master->num_sids; ++i) { - u32 sid = master->sids[i]; + for (i = 0; i < master->num_streams; ++i) { + u32 sid = master->streams[i].id; __le64 *step = arm_smmu_get_step_for_sid(smmu, sid); /* Bridged PCI devices may end up with duplicated IDs */ for (j = 0; j < i; j++) - if (master->sids[j] == sid) + if (master->streams[j].id == sid) break; if (j < i) continue; @@ -2345,11 +2367,101 @@ static bool arm_smmu_sid_in_range(struct arm_smmu_device *smmu, u32 sid) return sid < limit; } +static int arm_smmu_insert_master(struct arm_smmu_device *smmu, + struct arm_smmu_master *master) +{ + int i; + int ret = 0; + struct arm_smmu_stream *new_stream, *cur_stream; + struct rb_node **new_node, *parent_node = NULL; + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(master->dev); + + master->streams = kcalloc(fwspec->num_ids, sizeof(*master->streams), + GFP_KERNEL); + if (!master->streams) + return -ENOMEM; + master->num_streams = fwspec->num_ids; + + mutex_lock(&smmu->streams_mutex); + for (i = 0; i < fwspec->num_ids; i++) { + u32 sid = fwspec->ids[i]; + + new_stream = &master->streams[i]; + new_stream->id = sid; + new_stream->master = master; + + /* + * Check the SIDs are in range of the SMMU and our stream table + */ + if (!arm_smmu_sid_in_range(smmu, sid)) { + ret = -ERANGE; + break; + } + + /* Ensure l2 strtab is initialised */ + if (smmu->features & ARM_SMMU_FEAT_2_LVL_STRTAB) { + ret = arm_smmu_init_l2_strtab(smmu, sid); + if (ret) + break; + } + + /* Insert into SID tree */ + new_node = &(smmu->streams.rb_node); + while (*new_node) { + cur_stream = rb_entry(*new_node, struct arm_smmu_stream, + node); + parent_node = *new_node; + if (cur_stream->id > new_stream->id) { + new_node = &((*new_node)->rb_left); + } else if (cur_stream->id < new_stream->id) { + new_node = &((*new_node)->rb_right); + } else { + dev_warn(master->dev, + "stream %u already in tree\n", + cur_stream->id); + ret = -EINVAL; + break; + } + } + if (ret) + break; + + rb_link_node(&new_stream->node, parent_node, new_node); + rb_insert_color(&new_stream->node, &smmu->streams); + } + + if (ret) { + for (i--; i >= 0; i--) + rb_erase(&master->streams[i].node, &smmu->streams); + kfree(master->streams); + } + mutex_unlock(&smmu->streams_mutex); + + return ret; +} + +static void arm_smmu_remove_master(struct arm_smmu_master *master) +{ + int i; + struct arm_smmu_device *smmu = master->smmu; + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(master->dev); + + if (!smmu || !master->streams) + return; + + mutex_lock(&smmu->streams_mutex); + for (i = 0; i < fwspec->num_ids; i++) + rb_erase(&master->streams[i].node, &smmu->streams); + mutex_unlock(&smmu->streams_mutex); + + kfree(master->streams); +} + static struct iommu_ops arm_smmu_ops; static struct iommu_device *arm_smmu_probe_device(struct device *dev) { - int i, ret; + int ret; struct arm_smmu_device *smmu; struct arm_smmu_master *master; struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); @@ -2370,27 +2482,12 @@ static struct iommu_device *arm_smmu_probe_device(struct device *dev) master->dev = dev; master->smmu = smmu; - master->sids = fwspec->ids; - master->num_sids = fwspec->num_ids; INIT_LIST_HEAD(&master->bonds); dev_iommu_priv_set(dev, master); - /* Check the SIDs are in range of the SMMU and our stream table */ - for (i = 0; i < master->num_sids; i++) { - u32 sid = master->sids[i]; - - if (!arm_smmu_sid_in_range(smmu, sid)) { - ret = -ERANGE; - goto err_free_master; - } - - /* Ensure l2 strtab is initialised */ - if (smmu->features & ARM_SMMU_FEAT_2_LVL_STRTAB) { - ret = arm_smmu_init_l2_strtab(smmu, sid); - if (ret) - goto err_free_master; - } - } + ret = arm_smmu_insert_master(smmu, master); + if (ret) + goto err_free_master; device_property_read_u32(dev, "pasid-num-bits", &master->ssid_bits); master->ssid_bits = min(smmu->ssid_bits, master->ssid_bits); @@ -2429,6 +2526,7 @@ static void arm_smmu_release_device(struct device *dev) WARN_ON(arm_smmu_master_sva_enabled(master)); arm_smmu_detach_dev(master); arm_smmu_disable_pasid(master); + arm_smmu_remove_master(master); kfree(master); iommu_fwspec_free(dev); } @@ -2852,6 +2950,9 @@ static int arm_smmu_init_structures(struct arm_smmu_device *smmu) { int ret; + mutex_init(&smmu->streams_mutex); + smmu->streams = RB_ROOT; + ret = arm_smmu_init_queues(smmu); if (ret) return ret;