From patchwork Mon Nov 30 15:11:31 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 550165 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 52E501401E7 for ; Tue, 1 Dec 2015 02:14:37 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754711AbbK3PMe (ORCPT ); Mon, 30 Nov 2015 10:12:34 -0500 Received: from mga02.intel.com ([134.134.136.20]:15444 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754527AbbK3PMc (ORCPT ); Mon, 30 Nov 2015 10:12:32 -0500 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga101.jf.intel.com with ESMTP; 30 Nov 2015 07:12:21 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,364,1444719600"; d="scan'208";a="850542815" Received: from black.fi.intel.com ([10.237.72.93]) by fmsmga001.fm.intel.com with ESMTP; 30 Nov 2015 07:12:17 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 4CA76228; Mon, 30 Nov 2015 17:11:46 +0200 (EET) From: Andy Shevchenko To: "Rafael J . Wysocki" , Greg Kroah-Hartman , Jarkko Nikula , linux-i2c@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, Lee Jones , Mika Westerberg , Kevin Fenzi , Arnd Bergmann , Wolfram Sang Cc: Andy Shevchenko Subject: [PATCH v2 03/16] device property: refactor built-in properties support Date: Mon, 30 Nov 2015 17:11:31 +0200 Message-Id: <1448896304-87928-4-git-send-email-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.6.2 In-Reply-To: <1448896304-87928-1-git-send-email-andriy.shevchenko@linux.intel.com> References: <1448896304-87928-1-git-send-email-andriy.shevchenko@linux.intel.com> Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Instead of using the type and nval fields we will use length (in bytes) of the value. The sanity check is done in the accessors. The built-in property accessors are split in the same way such as device tree. Signed-off-by: Andy Shevchenko --- drivers/base/property.c | 150 ++++++++++++++++++++++++++++++++++------------- include/linux/property.h | 8 +-- 2 files changed, 113 insertions(+), 45 deletions(-) diff --git a/drivers/base/property.c b/drivers/base/property.c index 2e01f3f..86834bd 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -63,45 +63,107 @@ static struct property_entry *pset_prop_get(struct property_set *pset, return NULL; } -static int pset_prop_read_array(struct property_set *pset, const char *name, - enum dev_prop_type type, void *val, size_t nval) +static void *pset_prop_find(struct property_set *pset, const char *propname, + size_t length) { struct property_entry *prop; - unsigned int item_size; + void *pointer; - prop = pset_prop_get(pset, name); + prop = pset_prop_get(pset, propname); + if (!prop) + return ERR_PTR(-EINVAL); + pointer = prop->value.raw_data; + if (!pointer) + return ERR_PTR(-ENODATA); + if (length > prop->length) + return ERR_PTR(-EOVERFLOW); + return pointer; +} + +static int pset_prop_read_u8_array(struct property_set *pset, + const char *propname, + u8 *values, size_t nval) +{ + void *pointer; + size_t length = nval * sizeof(*values); + + pointer = pset_prop_find(pset, propname, length); + if (IS_ERR(pointer)) + return PTR_ERR(pointer); + + memcpy(values, pointer, length); + return 0; +} + +static int pset_prop_read_u16_array(struct property_set *pset, + const char *propname, + u16 *values, size_t nval) +{ + void *pointer; + size_t length = nval * sizeof(*values); + + pointer = pset_prop_find(pset, propname, length); + if (IS_ERR(pointer)) + return PTR_ERR(pointer); + + memcpy(values, pointer, length); + return 0; +} + +static int pset_prop_read_u32_array(struct property_set *pset, + const char *propname, + u32 *values, size_t nval) +{ + void *pointer; + size_t length = nval * sizeof(*values); + + pointer = pset_prop_find(pset, propname, length); + if (IS_ERR(pointer)) + return PTR_ERR(pointer); + + memcpy(values, pointer, length); + return 0; +} + +static int pset_prop_read_u64_array(struct property_set *pset, + const char *propname, + u64 *values, size_t nval) +{ + void *pointer; + size_t length = nval * sizeof(*values); + + pointer = pset_prop_find(pset, propname, length); + if (IS_ERR(pointer)) + return PTR_ERR(pointer); + + memcpy(values, pointer, length); + return 0; +} + +static int pset_prop_count_elems_of_size(struct property_set *pset, + const char *propname, size_t length) +{ + struct property_entry *prop; + + prop = pset_prop_get(pset, propname); if (!prop) - return -ENODATA; - - if (prop->type != type) - return -EPROTO; - - if (!val) - return prop->nval; - - if (prop->nval < nval) - return -EOVERFLOW; - - switch (type) { - case DEV_PROP_U8: - item_size = sizeof(u8); - break; - case DEV_PROP_U16: - item_size = sizeof(u16); - break; - case DEV_PROP_U32: - item_size = sizeof(u32); - break; - case DEV_PROP_U64: - item_size = sizeof(u64); - break; - case DEV_PROP_STRING: - item_size = sizeof(const char *); - break; - default: return -EINVAL; - } - memcpy(val, prop->value.raw_data, nval * item_size); + + return prop->length / length; +} + +static int pset_prop_read_string_array(struct property_set *pset, + const char *propname, + const char **strings, size_t nval) +{ + void *pointer; + size_t length = nval * sizeof(*strings); + + pointer = pset_prop_find(pset, propname, length); + if (IS_ERR(pointer)) + return PTR_ERR(pointer); + + memcpy(strings, pointer, length); return 0; } @@ -314,6 +376,10 @@ EXPORT_SYMBOL_GPL(device_property_match_string); (val) ? of_property_read_##type##_array((node), (propname), (val), (nval)) \ : of_property_count_elems_of_size((node), (propname), sizeof(type)) +#define PSET_PROP_READ_ARRAY(node, propname, type, val, nval) \ + (val) ? pset_prop_read_##type##_array((node), (propname), (val), (nval)) \ + : pset_prop_count_elems_of_size((node), (propname), sizeof(type)) + #define FWNODE_PROP_READ_ARRAY(_fwnode_, _propname_, _type_, _proptype_, _val_, _nval_) \ ({ \ int _ret_; \ @@ -324,8 +390,8 @@ EXPORT_SYMBOL_GPL(device_property_match_string); _ret_ = acpi_node_prop_read(_fwnode_, _propname_, _proptype_, \ _val_, _nval_); \ else if (is_pset_node(_fwnode_)) \ - _ret_ = pset_prop_read_array(to_pset_node(_fwnode_), _propname_, \ - _proptype_, _val_, _nval_); \ + _ret_ = PSET_PROP_READ_ARRAY(to_pset_node(_fwnode_), _propname_, \ + _type_, _val_, _nval_); \ else \ _ret_ = -ENXIO; \ _ret_; \ @@ -466,8 +532,12 @@ int fwnode_property_read_string_array(struct fwnode_handle *fwnode, return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING, val, nval); else if (is_pset_node(fwnode)) - return pset_prop_read_array(to_pset_node(fwnode), propname, - DEV_PROP_STRING, val, nval); + return val ? + pset_prop_read_string_array(to_pset_node(fwnode), + propname, val, nval) : + pset_prop_count_elems_of_size(to_pset_node(fwnode), + propname, + sizeof(const char *)); return -ENXIO; } EXPORT_SYMBOL_GPL(fwnode_property_read_string_array); @@ -496,8 +566,8 @@ int fwnode_property_read_string(struct fwnode_handle *fwnode, return acpi_node_prop_read(fwnode, propname, DEV_PROP_STRING, val, 1); else if (is_pset_node(fwnode)) - return pset_prop_read_array(to_pset_node(fwnode), propname, - DEV_PROP_STRING, val, 1); + return pset_prop_read_string_array(to_pset_node(fwnode), + propname, val, 1); return -ENXIO; } EXPORT_SYMBOL_GPL(fwnode_property_read_string); diff --git a/include/linux/property.h b/include/linux/property.h index 0a3705a..c29460a 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -144,14 +144,12 @@ static inline int fwnode_property_read_u64(struct fwnode_handle *fwnode, /** * struct property_entry - "Built-in" device property representation. * @name: Name of the property. - * @type: Type of the property. - * @nval: Number of items of type @type making up the value. - * @value: Value of the property (an array of @nval items of type @type). + * @length: Length of data making up the value. + * @value: Value of the property (an array of items of the given type). */ struct property_entry { const char *name; - enum dev_prop_type type; - size_t nval; + size_t length; union { void *raw_data; u8 *u8_data;