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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 D5343C47082 for ; Thu, 3 Jun 2021 16:46:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B92A6613B1 for ; Thu, 3 Jun 2021 16:46:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229809AbhFCQsA (ORCPT ); Thu, 3 Jun 2021 12:48:00 -0400 Received: from mail-ej1-f45.google.com ([209.85.218.45]:34722 "EHLO mail-ej1-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229719AbhFCQsA (ORCPT ); Thu, 3 Jun 2021 12:48:00 -0400 Received: by mail-ej1-f45.google.com with SMTP id g8so10262106ejx.1 for ; Thu, 03 Jun 2021 09:46:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Xzw2TUXY9p93oZxbwZKb0YQTzrG6r+scUnZo7x9ZCuU=; b=BLkLvFdApNPPc1q9dm6SyDGGREAVsuQgmtHybL+4Ju9BI2Ouw4EuFvuzh5TFfljaou rSdJmPTj7DJQs6BwlK35x8RuCodKVxouDgYyVI9FYSHyorPWgQAgDQ5F7HW4EzrXLvu+ Ly6zoAVjCiGWNEMseWyo5jTpij6fj2skQMnRL69EqYkc/X/JLUeJkRkI7el1HsVFoMjd cs4MLhUVZrLxR1+BVMQvpMxPU8EZ4DP0ilgpqyQbZohdATLha6u0uQAOzKhnu4JSSKXv 1mX+ILdrIkOayYuTPRONvrYaX/zjOaMqqkTo38mjcT3xFuhqtN5YshKcq0viUUS8CG4D bOrg== 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=Xzw2TUXY9p93oZxbwZKb0YQTzrG6r+scUnZo7x9ZCuU=; b=KVZbctvdUDm9QLk1OYpXK9OBv+FlxbJx1JP+tF+rILdVB1R/6KGtMQzy8Q9clmMvF4 7y0OvTjLqvhUwngSC9erHcElcJB8jvA4q/lR8+/S4+EbOLlTYP8yVwzHHrgdPt/+PV8K xydT6ZWe9UPc4iWCAg2FPE05fI8KQjhNMz4s6A2wckeSyzpT357TR1MJul+eFgFq40AZ GL6VJK2VvVvl2l2qbRe9jFkr/OxOeplx7GFCezy2MRPvjYwPnbjBLYI5J5aT3mrTr1KO GeuDno9qvNFJilwv/48C6XGDxpIYOmPABkMDa9dDraZuV3YrT3GMuh8XFi1g1EO361L3 9Zag== X-Gm-Message-State: AOAM533Pvau6sME5kvC9JEaztopAt5uvPF+YYZGPYcICxlDE5g7XZyO3 CzDN+qnvGsi0usUKyuY7bBQ= X-Google-Smtp-Source: ABdhPJxskXVbfgGBiwrxr5agPcu7F5QArOGLc64A8ytnD19xBd4ogTRNhjMOLdBL+Va4ArqBKjwpGw== X-Received: by 2002:a17:906:5407:: with SMTP id q7mr302416ejo.158.1622738701180; Thu, 03 Jun 2021 09:45:01 -0700 (PDT) Received: from localhost ([62.96.65.119]) by smtp.gmail.com with ESMTPSA id c19sm2079710edv.36.2021.06.03.09.44.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Jun 2021 09:45:00 -0700 (PDT) From: Thierry Reding To: Thierry Reding , Will Deacon , Krzysztof Kozlowski Cc: Robin Murphy , Joerg Roedel , Jon Hunter , Nicolin Chen , Krishna Reddy , linux-tegra@vger.kernel.org, iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 1/9] memory: tegra: Implement SID override programming Date: Thu, 3 Jun 2021 18:46:24 +0200 Message-Id: <20210603164632.1000458-2-thierry.reding@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210603164632.1000458-1-thierry.reding@gmail.com> References: <20210603164632.1000458-1-thierry.reding@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org From: Thierry Reding Instead of programming all SID overrides during early boot, perform the operation on-demand after the SMMU translations have been set up for a device. This reuses data from device tree to match memory clients for a device and programs the SID specified in device tree, which corresponds to the SID used for the SMMU context banks for the device. Signed-off-by: Thierry Reding --- drivers/memory/tegra/mc.c | 9 +++++ drivers/memory/tegra/tegra186.c | 72 +++++++++++++++++++++++++++++++++ include/soc/tegra/mc.h | 3 ++ 3 files changed, 84 insertions(+) diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c index 11b83de9361c..3c5aae7abf35 100644 --- a/drivers/memory/tegra/mc.c +++ b/drivers/memory/tegra/mc.c @@ -97,6 +97,15 @@ struct tegra_mc *devm_tegra_memory_controller_get(struct device *dev) } EXPORT_SYMBOL_GPL(devm_tegra_memory_controller_get); +int tegra_mc_probe_device(struct tegra_mc *mc, struct device *dev) +{ + if (mc->soc->ops && mc->soc->ops->probe_device) + return mc->soc->ops->probe_device(mc, dev); + + return 0; +} +EXPORT_SYMBOL_GPL(tegra_mc_probe_device); + static int tegra_mc_block_dma_common(struct tegra_mc *mc, const struct tegra_mc_reset *rst) { diff --git a/drivers/memory/tegra/tegra186.c b/drivers/memory/tegra/tegra186.c index 1f87915ccd62..e65eac5764d4 100644 --- a/drivers/memory/tegra/tegra186.c +++ b/drivers/memory/tegra/tegra186.c @@ -4,6 +4,7 @@ */ #include +#include #include #include #include @@ -15,6 +16,10 @@ #include #endif +#define MC_SID_STREAMID_OVERRIDE_MASK GENMASK(7, 0) +#define MC_SID_STREAMID_SECURITY_WRITE_ACCESS_DISABLED BIT(16) +#define MC_SID_STREAMID_SECURITY_OVERRIDE BIT(8) + static void tegra186_mc_program_sid(struct tegra_mc *mc) { unsigned int i; @@ -66,10 +71,77 @@ static int tegra186_mc_resume(struct tegra_mc *mc) return 0; } +static void tegra186_mc_client_sid_override(struct tegra_mc *mc, + const struct tegra_mc_client *client, + unsigned int sid) +{ + u32 value, old; + + value = readl(mc->regs + client->regs.sid.security); + if ((value & MC_SID_STREAMID_SECURITY_OVERRIDE) == 0) { + /* + * If the secure firmware has locked this down the override + * for this memory client, there's nothing we can do here. + */ + if (value & MC_SID_STREAMID_SECURITY_WRITE_ACCESS_DISABLED) + return; + + /* + * Otherwise, try to set the override itself. Typically the + * secure firmware will never have set this configuration. + * Instead, it will either have disabled write access to + * this field, or it will already have set an explicit + * override itself. + */ + WARN_ON((value & MC_SID_STREAMID_SECURITY_OVERRIDE) == 0); + + value |= MC_SID_STREAMID_SECURITY_OVERRIDE; + writel(value, mc->regs + client->regs.sid.security); + } + + value = readl(mc->regs + client->regs.sid.override); + old = value & MC_SID_STREAMID_OVERRIDE_MASK; + + if (old != sid) { + dev_dbg(mc->dev, "overriding SID %x for %s with %x\n", old, + client->name, sid); + writel(sid, mc->regs + client->regs.sid.override); + } +} + +static int tegra186_mc_probe_device(struct tegra_mc *mc, struct device *dev) +{ +#if IS_ENABLED(CONFIG_IOMMU_API) + struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); + struct of_phandle_args args; + unsigned int i, index = 0; + + while (!of_parse_phandle_with_args(dev->of_node, "interconnects", "#interconnect-cells", + index, &args)) { + if (args.np == mc->dev->of_node && args.args_count != 0) { + for (i = 0; i < mc->soc->num_clients; i++) { + const struct tegra_mc_client *client = &mc->soc->clients[i]; + + if (client->id == args.args[0]) { + u32 sid = fwspec->ids[0] & MC_SID_STREAMID_OVERRIDE_MASK; + + tegra186_mc_client_sid_override(mc, client, sid); + } + } + } + + index++; + } +#endif + + return 0; +} + const struct tegra_mc_ops tegra186_mc_ops = { .probe = tegra186_mc_probe, .remove = tegra186_mc_remove, .resume = tegra186_mc_resume, + .probe_device = tegra186_mc_probe_device, }; #if defined(CONFIG_ARCH_TEGRA_186_SOC) diff --git a/include/soc/tegra/mc.h b/include/soc/tegra/mc.h index 1bd5aed81868..e19c2504a14b 100644 --- a/include/soc/tegra/mc.h +++ b/include/soc/tegra/mc.h @@ -180,6 +180,7 @@ struct tegra_mc_ops { int (*suspend)(struct tegra_mc *mc); int (*resume)(struct tegra_mc *mc); irqreturn_t (*handle_irq)(int irq, void *data); + int (*probe_device)(struct tegra_mc *mc, struct device *dev); }; struct tegra_mc_soc { @@ -244,4 +245,6 @@ devm_tegra_memory_controller_get(struct device *dev) } #endif +int tegra_mc_probe_device(struct tegra_mc *mc, struct device *dev); + #endif /* __SOC_TEGRA_MC_H__ */ -- 2.31.1