From patchwork Mon Jul 11 11:26:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 589404 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 A5E3BC433EF for ; Mon, 11 Jul 2022 11:37:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231539AbiGKLhJ (ORCPT ); Mon, 11 Jul 2022 07:37:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55784 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231551AbiGKLgw (ORCPT ); Mon, 11 Jul 2022 07:36:52 -0400 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3DE348BA86 for ; Mon, 11 Jul 2022 04:24:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1657538647; x=1689074647; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Up/emJxCa0W79mpVZm/FCUSFb5FZXF2iTT9CDDKqchQ=; b=k6U0oG1C0rgCwglNOYSZ/iIFRZgfqjzu6YFlD3lDsABIa6WxYG1M6Vx+ 7UEvNSawqjX+PqhephBcuL4WYHIu5rqSALMzjm65zjDtLIqQKpg4+uyPr ON2geTWqD2FAUes7i5kLrqeg/EayUHvqpRdRpe/9tnW3SwlSra4OHc84g 3S8I+t7LdnhuXb9FmMf74ahMZtbPmGbD++G44grc0RfkfvX1YHQIIbQBR C5L9+RHR36+QUpX7Ywl3egO4CoAkxvg8Hh49DlFOJC1xfL8Xg93Ma2hxS 5JOpzFO4hyeLpLE28dF9S5gcfKEyuHnQ9h4bBBXOp0DkfEU+yGNl3cUuI A==; X-IronPort-AV: E=McAfee;i="6400,9594,10404"; a="282186973" X-IronPort-AV: E=Sophos;i="5.92,262,1650956400"; d="scan'208";a="282186973" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jul 2022 04:24:04 -0700 X-IronPort-AV: E=Sophos;i="5.92,262,1650956400"; d="scan'208";a="544975519" Received: from punajuuri.fi.intel.com (HELO paasikivi.fi.intel.com) ([10.237.72.43]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jul 2022 04:24:03 -0700 Received: from punajuuri.localdomain (punajuuri.localdomain [192.168.240.130]) by paasikivi.fi.intel.com (Postfix) with ESMTP id 2AD0222018; Mon, 11 Jul 2022 14:23:58 +0300 (EEST) Received: from sailus by punajuuri.localdomain with local (Exim 4.94.2) (envelope-from ) id 1oArYE-00CnYk-Hw; Mon, 11 Jul 2022 14:26:06 +0300 From: Sakari Ailus To: linux-acpi@vger.kernel.org Cc: rafael@kernel.org, andriy.shevchenko@intel.com Subject: [PATCH v4 7/8] ACPI: property: Add support for parsing buffer property UUID Date: Mon, 11 Jul 2022 14:26:05 +0300 Message-Id: <20220711112606.3050368-8-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220711112606.3050368-1-sakari.ailus@linux.intel.com> References: <20220711112606.3050368-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Add support for newly added buffer property UUID, as defined in the DSD guide. Signed-off-by: Sakari Ailus --- drivers/acpi/property.c | 142 ++++++++++++++++++++++++++++++++++++---- include/acpi/acpi_bus.h | 3 +- include/linux/acpi.h | 2 +- 3 files changed, 132 insertions(+), 15 deletions(-) diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c index 236a847f1bfbd..7621f684212ff 100644 --- a/drivers/acpi/property.c +++ b/drivers/acpi/property.c @@ -55,14 +55,19 @@ static const guid_t ads_guid = GUID_INIT(0xdbb8e3e6, 0x5886, 0x4ba6, 0x87, 0x95, 0x13, 0x19, 0xf5, 0x2a, 0x96, 0x6b); +static const guid_t buffer_prop_guid = + GUID_INIT(0xedb12dd0, 0x363d, 0x4085, + 0xa3, 0xd2, 0x49, 0x52, 0x2c, 0xa1, 0x60, 0xc4); + static bool acpi_enumerate_nondev_subnodes(acpi_handle scope, - const union acpi_object *desc, + union acpi_object *desc, struct acpi_device_data *data, struct fwnode_handle *parent); -static bool acpi_extract_properties(const union acpi_object *desc, +static bool acpi_extract_properties(acpi_handle handle, + union acpi_object *desc, struct acpi_device_data *data); -static bool acpi_nondev_subnode_extract(const union acpi_object *desc, +static bool acpi_nondev_subnode_extract(union acpi_object *desc, acpi_handle handle, const union acpi_object *link, struct list_head *list, @@ -81,7 +86,7 @@ static bool acpi_nondev_subnode_extract(const union acpi_object *desc, INIT_LIST_HEAD(&dn->data.properties); INIT_LIST_HEAD(&dn->data.subnodes); - result = acpi_extract_properties(desc, &dn->data); + result = acpi_extract_properties(handle, desc, &dn->data); if (handle) { acpi_handle scope; @@ -156,7 +161,7 @@ static bool acpi_nondev_subnode_ok(acpi_handle scope, } static bool acpi_add_nondev_subnodes(acpi_handle scope, - const union acpi_object *links, + union acpi_object *links, struct list_head *list, struct fwnode_handle *parent) { @@ -164,7 +169,7 @@ static bool acpi_add_nondev_subnodes(acpi_handle scope, int i; for (i = 0; i < links->package.count; i++) { - const union acpi_object *link, *desc; + union acpi_object *link, *desc; acpi_handle handle; bool result; @@ -204,7 +209,7 @@ static bool acpi_add_nondev_subnodes(acpi_handle scope, } static bool acpi_enumerate_nondev_subnodes(acpi_handle scope, - const union acpi_object *desc, + union acpi_object *desc, struct acpi_device_data *data, struct fwnode_handle *parent) { @@ -212,7 +217,8 @@ static bool acpi_enumerate_nondev_subnodes(acpi_handle scope, /* Look for the ACPI data subnodes GUID. */ for (i = 0; i < desc->package.count; i += 2) { - const union acpi_object *guid, *links; + const union acpi_object *guid; + union acpi_object *links; guid = &desc->package.elements[i]; links = &desc->package.elements[i + 1]; @@ -325,7 +331,7 @@ static bool acpi_is_property_guid(const guid_t *guid) struct acpi_device_properties * acpi_data_add_props(struct acpi_device_data *data, const guid_t *guid, - const union acpi_object *properties) + union acpi_object *properties) { struct acpi_device_properties *props; @@ -377,7 +383,104 @@ static bool acpi_tie_nondev_subnodes(struct acpi_device_data *data) return true; } -static bool acpi_extract_properties(const union acpi_object *desc, +static void acpi_data_add_buffer_props(acpi_handle handle, + struct acpi_device_data *data, + union acpi_object *properties) +{ + struct acpi_device_properties *props; + union acpi_object *package; + size_t alloc_size; + unsigned int i; + u32 *count; + + if (check_mul_overflow((size_t)properties->package.count, + sizeof(*package) + sizeof(void *), + &alloc_size) || + check_add_overflow(sizeof(*props) + sizeof(*package), alloc_size, + &alloc_size)) { + acpi_handle_warn(handle, + "can't allocate memory for %u buffer props", + properties->package.count); + return; + } + + props = kvzalloc(alloc_size, GFP_KERNEL); + if (!props) + return; + + props->guid = &buffer_prop_guid; + props->bufs = (void *)(props + 1); + props->properties = (void *)(props->bufs + properties->package.count); + + /* Outer package */ + package = props->properties; + package->type = ACPI_TYPE_PACKAGE; + package->package.elements = package + 1; + count = &package->package.count; + *count = 0; + + /* Inner packages */ + package++; + + for (i = 0; i < properties->package.count; i++) { + struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; + union acpi_object *property = &properties->package.elements[i]; + union acpi_object *prop, *obj, *buf_obj; + acpi_status status; + + if (property->type != ACPI_TYPE_PACKAGE || + property->package.count != 2) { + acpi_handle_warn(handle, + "buffer property %u has %u entries\n", + i, property->package.count); + continue; + } + + prop = &property->package.elements[0]; + obj = &property->package.elements[1]; + + if (prop->type != ACPI_TYPE_STRING || + obj->type != ACPI_TYPE_STRING) { + acpi_handle_warn(handle, + "wrong object types %u and %u\n", + prop->type, obj->type); + continue; + } + + status = acpi_evaluate_object_typed(handle, obj->string.pointer, + NULL, &buf, + ACPI_TYPE_BUFFER); + if (ACPI_FAILURE(status)) { + acpi_handle_warn(handle, + "can't evaluate \"%*pE\" as buffer\n", + obj->string.length, + obj->string.pointer); + continue; + } + + package->type = ACPI_TYPE_PACKAGE; + package->package.elements = prop; + package->package.count = 2; + + buf_obj = buf.pointer; + + /* Replace the string object with a buffer object */ + obj->type = ACPI_TYPE_BUFFER; + obj->buffer.length = buf_obj->buffer.length; + obj->buffer.pointer = buf_obj->buffer.pointer; + + props->bufs[i] = buf.pointer; + package++; + (*count)++; + } + + if (*count) + list_add(&props->list, &data->properties); + else + kvfree(props); +} + +static bool acpi_extract_properties(acpi_handle scope, union acpi_object *desc, struct acpi_device_data *data) { int i; @@ -387,7 +490,8 @@ static bool acpi_extract_properties(const union acpi_object *desc, /* Look for the device properties GUID. */ for (i = 0; i < desc->package.count; i += 2) { - const union acpi_object *guid, *properties; + const union acpi_object *guid; + union acpi_object *properties; guid = &desc->package.elements[i]; properties = &desc->package.elements[i + 1]; @@ -401,6 +505,12 @@ static bool acpi_extract_properties(const union acpi_object *desc, properties->type != ACPI_TYPE_PACKAGE) break; + if (guid_equal((guid_t *)guid->buffer.pointer, + &buffer_prop_guid)) { + acpi_data_add_buffer_props(scope, data, properties); + continue; + } + if (!acpi_is_property_guid((guid_t *)guid->buffer.pointer)) continue; @@ -447,7 +557,7 @@ void acpi_init_properties(struct acpi_device *adev) if (ACPI_FAILURE(status)) goto out; - if (acpi_extract_properties(buf.pointer, &adev->data)) { + if (acpi_extract_properties(adev->handle, buf.pointer, &adev->data)) { adev->data.pointer = buf.pointer; if (acpi_of) acpi_init_of_compatible(adev); @@ -477,8 +587,14 @@ static void acpi_free_device_properties(struct list_head *list) struct acpi_device_properties *props, *tmp; list_for_each_entry_safe(props, tmp, list, list) { + u32 i; + list_del(&props->list); - kfree(props); + /* Buffer data properties were separately allocated */ + if (props->bufs) + for (i = 0; i < props->properties->package.count; i++) + ACPI_FREE(props->bufs[i]); + kvfree(props); } } diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 54c5566df9fe1..88a17fce49fd0 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -344,8 +344,9 @@ struct acpi_device_physical_node { struct acpi_device_properties { const guid_t *guid; - const union acpi_object *properties; + union acpi_object *properties; struct list_head list; + void **bufs; }; /* ACPI Device Specific Data (_DSD) */ diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 4f82a5bc6d987..93a695cab9d8a 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -1243,7 +1243,7 @@ static inline bool acpi_dev_has_props(const struct acpi_device *adev) struct acpi_device_properties * acpi_data_add_props(struct acpi_device_data *data, const guid_t *guid, - const union acpi_object *properties); + union acpi_object *properties); int acpi_node_prop_get(const struct fwnode_handle *fwnode, const char *propname, void **valptr);