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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 85039C433FE for ; Tue, 1 Nov 2022 19:11:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230354AbiKATLJ (ORCPT ); Tue, 1 Nov 2022 15:11:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38608 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230219AbiKATKz (ORCPT ); Tue, 1 Nov 2022 15:10:55 -0400 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0E2821CB10; Tue, 1 Nov 2022 12:10:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1667329855; x=1698865855; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=NA5/t41ZCbqszgHs3lJC1knncUR7kRh2Cap2isglxDI=; b=eyf6Axlr/KQZNbcUoeOkGWBnmTn+LgD3LWsLDM7jtUTShVnntEvKVwLt lVipl6iYQoBbexu4lPkNTs54ur18/xeLamU0HDmVOLh9vpKGJV67HLDNK vfPi4T5naMi8QB9G/iiLCHI0W5eezlkyE/YnwUbvtHcXcNWyn+VyiFM70 sISiVG8QdPFZjz5BvRzwqpTo/ub6qx1NNHlrY0Er1ix9EgVaPE6yI9lD4 LIvd7KDRX11Y9SulHCMLu+5LkYgATInwmk+axWStvV3tyIi1PZkDWq3JR gSRrwr5MHQsMMXhfxBHXjYwYllmwkHTbVza9Ld5CPv2dSQpBxiHJFJX2H g==; X-IronPort-AV: E=McAfee;i="6500,9779,10518"; a="289607881" X-IronPort-AV: E=Sophos;i="5.95,231,1661842800"; d="scan'208";a="289607881" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Nov 2022 12:10:27 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10518"; a="667299027" X-IronPort-AV: E=Sophos;i="5.95,231,1661842800"; d="scan'208";a="667299027" Received: from linux.intel.com ([10.54.29.200]) by orsmga001.jf.intel.com with ESMTP; 01 Nov 2022 12:10:26 -0700 Received: from debox1-desk4.intel.com (unknown [10.212.195.64]) by linux.intel.com (Postfix) with ESMTP id 70A9A580AA7; Tue, 1 Nov 2022 12:10:26 -0700 (PDT) From: "David E. Box" To: hdegoede@redhat.com, markgross@kernel.org, andriy.shevchenko@linux.intel.com, srinivas.pandruvada@intel.com Cc: "David E. Box" , platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/9] platform/x86/intel/sdsi: Support different GUIDs Date: Tue, 1 Nov 2022 12:10:17 -0700 Message-Id: <20221101191023.4150315-4-david.e.box@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221101191023.4150315-1-david.e.box@linux.intel.com> References: <20221101191023.4150315-1-david.e.box@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Newer versions of Intel On Demand hardware may have an expanded list of registers to support new features. The register layout is identified by a unique GUID that's read during driver probe. Add support for handling different GUIDs and add support for current GUIDs [1]. [1] https://github.com/intel/intel-sdsi/blob/master/os-interface.rst Signed-off-by: David E. Box --- drivers/platform/x86/intel/sdsi.c | 47 +++++++++++++++++++++++++++++-- 1 file changed, 44 insertions(+), 3 deletions(-) diff --git a/drivers/platform/x86/intel/sdsi.c b/drivers/platform/x86/intel/sdsi.c index bca05b4dd983..ab1f65919fc5 100644 --- a/drivers/platform/x86/intel/sdsi.c +++ b/drivers/platform/x86/intel/sdsi.c @@ -27,10 +27,10 @@ #define ACCESS_TYPE_LOCAL 3 #define SDSI_MIN_SIZE_DWORDS 276 -#define SDSI_SIZE_CONTROL 8 #define SDSI_SIZE_MAILBOX 1024 -#define SDSI_SIZE_REGS 72 +#define SDSI_SIZE_REGS 80 #define SDSI_SIZE_CMD sizeof(u64) +#define SDSI_SIZE_MAILBOX 1024 /* * Write messages are currently up to the size of the mailbox @@ -76,6 +76,9 @@ #define DT_TBIR GENMASK(2, 0) #define DT_OFFSET(v) ((v) & GENMASK(31, 3)) +#define SDSI_GUID_V1 0x006DD191 +#define SDSI_GUID_V2 0xF210D9EF + enum sdsi_command { SDSI_CMD_PROVISION_AKC = 0x04, SDSI_CMD_PROVISION_CAP = 0x08, @@ -100,6 +103,9 @@ struct sdsi_priv { void __iomem *control_addr; void __iomem *mbox_addr; void __iomem *regs_addr; + int control_size; + int maibox_size; + int registers_size; u32 guid; u32 features; }; @@ -444,6 +450,18 @@ static ssize_t registers_read(struct file *filp, struct kobject *kobj, struct device *dev = kobj_to_dev(kobj); struct sdsi_priv *priv = dev_get_drvdata(dev); void __iomem *addr = priv->regs_addr; + int size = priv->registers_size; + + /* + * The check below is performed by the sysfs caller based on the static + * file size. But this may be greater than the actual size which is based + * on the GUID. So check here again based on actual size before reading. + */ + if (off >= size) + return 0; + + if (off + count > size) + count = size - off; memcpy_fromio(buf, addr + off, count); @@ -496,6 +514,24 @@ static const struct attribute_group sdsi_group = { }; __ATTRIBUTE_GROUPS(sdsi); +static int sdsi_get_layout(struct sdsi_priv *priv, struct disc_table *table) +{ + switch (table->guid) { + case SDSI_GUID_V1: + priv->control_size = 8; + priv->registers_size = 72; + break; + case SDSI_GUID_V2: + priv->control_size = 16; + priv->registers_size = 80; + break; + default: + dev_err(priv->dev, "Unrecognized GUID 0x%x\n", table->guid); + return -EINVAL; + } + return 0; +} + static int sdsi_map_mbox_registers(struct sdsi_priv *priv, struct pci_dev *parent, struct disc_table *disc_table, struct resource *disc_res) { @@ -537,7 +573,7 @@ static int sdsi_map_mbox_registers(struct sdsi_priv *priv, struct pci_dev *paren if (IS_ERR(priv->control_addr)) return PTR_ERR(priv->control_addr); - priv->mbox_addr = priv->control_addr + SDSI_SIZE_CONTROL; + priv->mbox_addr = priv->control_addr + priv->control_size; priv->regs_addr = priv->mbox_addr + SDSI_SIZE_MAILBOX; priv->features = readq(priv->regs_addr + SDSI_ENABLED_FEATURES_OFFSET); @@ -572,6 +608,11 @@ static int sdsi_probe(struct auxiliary_device *auxdev, const struct auxiliary_de priv->guid = disc_table.guid; + /* Get guid based layout info */ + ret = sdsi_get_layout(priv, &disc_table); + if (ret) + return ret; + /* Map the SDSi mailbox registers */ ret = sdsi_map_mbox_registers(priv, intel_cap_dev->pcidev, &disc_table, disc_res); if (ret) -- 2.25.1