From patchwork Wed Jun 14 21:48:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 13280476 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 9AAF6EB64DB for ; Wed, 14 Jun 2023 21:48:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235625AbjFNVsJ (ORCPT ); Wed, 14 Jun 2023 17:48:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49510 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231721AbjFNVsI (ORCPT ); Wed, 14 Jun 2023 17:48:08 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4DE04268A; Wed, 14 Jun 2023 14:48:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1686779286; x=1718315286; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=K92ovf7KoLTETblYL4uXKMDLMLAzGV5vIgCbG6skDYw=; b=iKye6tavnq8MWXDHIeQNWNMfJUF0kSny2KHJBf2LBVnHAGYz1KAVv8fj gQhbqNuV1VWfw9GT367EPj0zJZscAZQ9373qLYDukgshdlCejnZl0i//p DBp3C4O8xKr7yJcUKKooWbES8ASZVwysAbeO2mTXPjD/V3H93/6Gu2w1k 12qvGsI4DHVuvn6KBFENsMpwNc2pRovKBU/hgiXnFQbn3M5U6xFtCjxuw nThba1wNP3tJAkpCDXe68JWtIoTxZhQLsKDTXXB0oQkccOG3Ht6WJNmow 5nk6q4ufH3t/DXMQ4mebwo0ysux0hKZ6I4R+qLa1sopT07s+XVRcjVIk2 Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10741"; a="357624220" X-IronPort-AV: E=Sophos;i="6.00,243,1681196400"; d="scan'208";a="357624220" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2023 14:48:06 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10741"; a="715366000" X-IronPort-AV: E=Sophos;i="6.00,243,1681196400"; d="scan'208";a="715366000" Received: from djiang5-mobl3.amr.corp.intel.com (HELO [192.168.1.177]) ([10.212.110.39]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2023 14:48:05 -0700 Subject: [PATCH v4 1/4] acpi: Move common tables helper functions to common lib From: Dave Jiang To: linux-acpi@vger.kernel.org, linux-cxl@vger.kernel.org Cc: "Rafael J. Wysocki" , "Rafael J. Wysocki" , rafael@kernel.org, lenb@kernel.org, dan.j.williams@intel.com, ira.weiny@intel.com, vishal.l.verma@intel.com, alison.schofield@intel.com, lukas@wunner.de, Jonathan.Cameron@huawei.com, guohanjun@huawei.com Date: Wed, 14 Jun 2023 14:48:04 -0700 Message-ID: <168677928492.2787985.344130142021460418.stgit@djiang5-mobl3> In-Reply-To: <168677921156.2787985.6927511816148622557.stgit@djiang5-mobl3> References: <168677921156.2787985.6927511816148622557.stgit@djiang5-mobl3> User-Agent: StGit/1.5 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org Some of the routines in ACPI driver/acpi/tables.c can be shared with parsing CDAT. CDAT is a device-provided data structure that is formatted similar to a platform provided ACPI table. CDAT is used by CXL and can exist on platforms that do not use ACPI. Split out the common routine from ACPI to accommodate platforms that do not support ACPI and move that to /lib. The common routines can be built outside of ACPI if FIRMWARE_TABLES is selected. Link: https://lore.kernel.org/linux-cxl/CAJZ5v0jipbtTNnsA0-o5ozOk8ZgWnOg34m34a9pPenTyRLj=6A@mail.gmail.com/ Suggested-by: Rafael J. Wysocki Signed-off-by: Dave Jiang Acked-by: Rafael J. Wysocki Reviewed-by: Hanjun Guo --- v4: - Add MAINTAINERS entry (Hanjun) - Move __init_or_acpilib outside CONFIG_ACPI (0-day) --- MAINTAINERS | 2 drivers/acpi/Kconfig | 1 drivers/acpi/tables.c | 173 ------------------------------------------ include/linux/acpi.h | 42 +++------- include/linux/fw_table.h | 43 ++++++++++ lib/Kconfig | 3 + lib/Makefile | 2 lib/fw_table.c | 189 ++++++++++++++++++++++++++++++++++++++++++++++ 8 files changed, 251 insertions(+), 204 deletions(-) create mode 100644 include/linux/fw_table.h create mode 100644 lib/fw_table.c diff --git a/MAINTAINERS b/MAINTAINERS index 250518fc70ff..2145438e00dc 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -371,6 +371,8 @@ F: include/acpi/ F: include/linux/acpi.h F: include/linux/fwnode.h F: tools/power/acpi/ +F: include/linux/fw_table.h +F: lib/fw_table.c ACPI APEI M: "Rafael J. Wysocki" diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index ccbeab9500ec..320d36b2ec78 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -12,6 +12,7 @@ menuconfig ACPI select PNP select NLS select CRC32 + select FIRMWARE_TABLE default y if X86 help Advanced Configuration and Power Interface (ACPI) support for diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c index 7b4680da57d7..cfc76efd8788 100644 --- a/drivers/acpi/tables.c +++ b/drivers/acpi/tables.c @@ -37,18 +37,6 @@ static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata; static int acpi_apic_instance __initdata_or_acpilib; -enum acpi_subtable_type { - ACPI_SUBTABLE_COMMON, - ACPI_SUBTABLE_HMAT, - ACPI_SUBTABLE_PRMT, - ACPI_SUBTABLE_CEDT, -}; - -struct acpi_subtable_entry { - union acpi_subtable_headers *hdr; - enum acpi_subtable_type type; -}; - /* * Disable table checksum verification for the early stage due to the size * limitation of the current x86 early mapping implementation. @@ -227,167 +215,6 @@ void acpi_table_print_madt_entry(struct acpi_subtable_header *header) } } -static unsigned long __init_or_acpilib -acpi_get_entry_type(struct acpi_subtable_entry *entry) -{ - switch (entry->type) { - case ACPI_SUBTABLE_COMMON: - return entry->hdr->common.type; - case ACPI_SUBTABLE_HMAT: - return entry->hdr->hmat.type; - case ACPI_SUBTABLE_PRMT: - return 0; - case ACPI_SUBTABLE_CEDT: - return entry->hdr->cedt.type; - } - return 0; -} - -static unsigned long __init_or_acpilib -acpi_get_entry_length(struct acpi_subtable_entry *entry) -{ - switch (entry->type) { - case ACPI_SUBTABLE_COMMON: - return entry->hdr->common.length; - case ACPI_SUBTABLE_HMAT: - return entry->hdr->hmat.length; - case ACPI_SUBTABLE_PRMT: - return entry->hdr->prmt.length; - case ACPI_SUBTABLE_CEDT: - return entry->hdr->cedt.length; - } - return 0; -} - -static unsigned long __init_or_acpilib -acpi_get_subtable_header_length(struct acpi_subtable_entry *entry) -{ - switch (entry->type) { - case ACPI_SUBTABLE_COMMON: - return sizeof(entry->hdr->common); - case ACPI_SUBTABLE_HMAT: - return sizeof(entry->hdr->hmat); - case ACPI_SUBTABLE_PRMT: - return sizeof(entry->hdr->prmt); - case ACPI_SUBTABLE_CEDT: - return sizeof(entry->hdr->cedt); - } - return 0; -} - -static enum acpi_subtable_type __init_or_acpilib -acpi_get_subtable_type(char *id) -{ - if (strncmp(id, ACPI_SIG_HMAT, 4) == 0) - return ACPI_SUBTABLE_HMAT; - if (strncmp(id, ACPI_SIG_PRMT, 4) == 0) - return ACPI_SUBTABLE_PRMT; - if (strncmp(id, ACPI_SIG_CEDT, 4) == 0) - return ACPI_SUBTABLE_CEDT; - return ACPI_SUBTABLE_COMMON; -} - -static __init_or_acpilib bool has_handler(struct acpi_subtable_proc *proc) -{ - return proc->handler || proc->handler_arg; -} - -static __init_or_acpilib int call_handler(struct acpi_subtable_proc *proc, - union acpi_subtable_headers *hdr, - unsigned long end) -{ - if (proc->handler) - return proc->handler(hdr, end); - if (proc->handler_arg) - return proc->handler_arg(hdr, proc->arg, end); - return -EINVAL; -} - -/** - * acpi_parse_entries_array - for each proc_num find a suitable subtable - * - * @id: table id (for debugging purposes) - * @table_size: size of the root table - * @table_header: where does the table start? - * @proc: array of acpi_subtable_proc struct containing entry id - * and associated handler with it - * @proc_num: how big proc is? - * @max_entries: how many entries can we process? - * - * For each proc_num find a subtable with proc->id and run proc->handler - * on it. Assumption is that there's only single handler for particular - * entry id. - * - * The table_size is not the size of the complete ACPI table (the length - * field in the header struct), but only the size of the root table; i.e., - * the offset from the very first byte of the complete ACPI table, to the - * first byte of the very first subtable. - * - * On success returns sum of all matching entries for all proc handlers. - * Otherwise, -ENODEV or -EINVAL is returned. - */ -static int __init_or_acpilib acpi_parse_entries_array( - char *id, unsigned long table_size, - struct acpi_table_header *table_header, struct acpi_subtable_proc *proc, - int proc_num, unsigned int max_entries) -{ - struct acpi_subtable_entry entry; - unsigned long table_end, subtable_len, entry_len; - int count = 0; - int errs = 0; - int i; - - table_end = (unsigned long)table_header + table_header->length; - - /* Parse all entries looking for a match. */ - - entry.type = acpi_get_subtable_type(id); - entry.hdr = (union acpi_subtable_headers *) - ((unsigned long)table_header + table_size); - subtable_len = acpi_get_subtable_header_length(&entry); - - while (((unsigned long)entry.hdr) + subtable_len < table_end) { - if (max_entries && count >= max_entries) - break; - - for (i = 0; i < proc_num; i++) { - if (acpi_get_entry_type(&entry) != proc[i].id) - continue; - if (!has_handler(&proc[i]) || - (!errs && - call_handler(&proc[i], entry.hdr, table_end))) { - errs++; - continue; - } - - proc[i].count++; - break; - } - if (i != proc_num) - count++; - - /* - * If entry->length is 0, break from this loop to avoid - * infinite loop. - */ - entry_len = acpi_get_entry_length(&entry); - if (entry_len == 0) { - pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id); - return -EINVAL; - } - - entry.hdr = (union acpi_subtable_headers *) - ((unsigned long)entry.hdr + entry_len); - } - - if (max_entries && count > max_entries) { - pr_warn("[%4.4s:0x%02x] found the maximum %i entries\n", - id, proc->id, count); - } - - return errs ? -EINVAL : count; -} - int __init_or_acpilib acpi_table_parse_entries_array( char *id, unsigned long table_size, struct acpi_subtable_proc *proc, int proc_num, unsigned int max_entries) diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 7b71dd74baeb..bf3433747495 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -15,6 +15,7 @@ #include #include #include +#include struct irq_domain; struct irq_domain_ops; @@ -24,6 +25,16 @@ struct irq_domain_ops; #endif #include +#ifdef CONFIG_ACPI_TABLE_LIB +#define EXPORT_SYMBOL_ACPI_LIB(x) EXPORT_SYMBOL_NS_GPL(x, ACPI) +#define __init_or_acpilib +#define __initdata_or_acpilib +#else +#define EXPORT_SYMBOL_ACPI_LIB(x) +#define __init_or_acpilib __init +#define __initdata_or_acpilib __initdata +#endif + #ifdef CONFIG_ACPI #include @@ -132,21 +143,8 @@ enum acpi_address_range_id { /* Table Handlers */ -union acpi_subtable_headers { - struct acpi_subtable_header common; - struct acpi_hmat_structure hmat; - struct acpi_prmt_module_header prmt; - struct acpi_cedt_header cedt; -}; - typedef int (*acpi_tbl_table_handler)(struct acpi_table_header *table); -typedef int (*acpi_tbl_entry_handler)(union acpi_subtable_headers *header, - const unsigned long end); - -typedef int (*acpi_tbl_entry_handler_arg)(union acpi_subtable_headers *header, - void *arg, const unsigned long end); - /* Debugger support */ struct acpi_debugger_ops { @@ -220,14 +218,6 @@ static inline int acpi_debugger_notify_command_complete(void) (!entry) || (unsigned long)entry + sizeof(*entry) > end || \ ((struct acpi_subtable_header *)entry)->length < sizeof(*entry)) -struct acpi_subtable_proc { - int id; - acpi_tbl_entry_handler handler; - acpi_tbl_entry_handler_arg handler_arg; - void *arg; - int count; -}; - void __iomem *__acpi_map_table(unsigned long phys, unsigned long size); void __acpi_unmap_table(void __iomem *map, unsigned long size); int early_acpi_boot_init(void); @@ -242,16 +232,6 @@ void acpi_reserve_initial_tables (void); void acpi_table_init_complete (void); int acpi_table_init (void); -#ifdef CONFIG_ACPI_TABLE_LIB -#define EXPORT_SYMBOL_ACPI_LIB(x) EXPORT_SYMBOL_NS_GPL(x, ACPI) -#define __init_or_acpilib -#define __initdata_or_acpilib -#else -#define EXPORT_SYMBOL_ACPI_LIB(x) -#define __init_or_acpilib __init -#define __initdata_or_acpilib __initdata -#endif - int acpi_table_parse(char *id, acpi_tbl_table_handler handler); int __init_or_acpilib acpi_table_parse_entries(char *id, unsigned long table_size, int entry_id, diff --git a/include/linux/fw_table.h b/include/linux/fw_table.h new file mode 100644 index 000000000000..ff8fa58d5818 --- /dev/null +++ b/include/linux/fw_table.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * fw_tables.h - Parsing support for ACPI and ACPI-like tables provided by + * platform or device firmware + * + * Copyright (C) 2001 Paul Diefenbaugh + * Copyright (C) 2023 Intel Corp. + */ +#ifndef _FW_TABLE_H_ +#define _FW_TABLE_H_ + +union acpi_subtable_headers; + +typedef int (*acpi_tbl_entry_handler)(union acpi_subtable_headers *header, + const unsigned long end); + +typedef int (*acpi_tbl_entry_handler_arg)(union acpi_subtable_headers *header, + void *arg, const unsigned long end); + +struct acpi_subtable_proc { + int id; + acpi_tbl_entry_handler handler; + acpi_tbl_entry_handler_arg handler_arg; + void *arg; + int count; +}; + +#include +#include + +union acpi_subtable_headers { + struct acpi_subtable_header common; + struct acpi_hmat_structure hmat; + struct acpi_prmt_module_header prmt; + struct acpi_cedt_header cedt; +}; + +int acpi_parse_entries_array(char *id, unsigned long table_size, + struct acpi_table_header *table_header, + struct acpi_subtable_proc *proc, + int proc_num, unsigned int max_entries); + +#endif diff --git a/lib/Kconfig b/lib/Kconfig index 5c2da561c516..b03714d45444 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -763,3 +763,6 @@ config ASN1_ENCODER config POLYNOMIAL tristate + +config FIRMWARE_TABLE + bool diff --git a/lib/Makefile b/lib/Makefile index 876fcdeae34e..16e238baef4b 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -397,6 +397,8 @@ obj-$(CONFIG_SIPHASH_KUNIT_TEST) += siphash_kunit.o obj-$(CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED) += devmem_is_allowed.o +obj-$(CONFIG_FIRMWARE_TABLE) += fw_table.o + # FORTIFY_SOURCE compile-time behavior tests TEST_FORTIFY_SRCS = $(wildcard $(srctree)/$(src)/test_fortify/*-*.c) TEST_FORTIFY_LOGS = $(patsubst $(srctree)/$(src)/%.c, %.log, $(TEST_FORTIFY_SRCS)) diff --git a/lib/fw_table.c b/lib/fw_table.c new file mode 100644 index 000000000000..e84bd0866e10 --- /dev/null +++ b/lib/fw_table.c @@ -0,0 +1,189 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * fw_tables.c - Parsing support for ACPI and ACPI-like tables provided by + * platform or device firmware + * + * Copyright (C) 2001 Paul Diefenbaugh + * Copyright (C) 2023 Intel Corp. + */ +#include +#include +#include +#include +#include +#include + +enum acpi_subtable_type { + ACPI_SUBTABLE_COMMON, + ACPI_SUBTABLE_HMAT, + ACPI_SUBTABLE_PRMT, + ACPI_SUBTABLE_CEDT, +}; + +struct acpi_subtable_entry { + union acpi_subtable_headers *hdr; + enum acpi_subtable_type type; +}; + +static unsigned long __init_or_acpilib +acpi_get_entry_type(struct acpi_subtable_entry *entry) +{ + switch (entry->type) { + case ACPI_SUBTABLE_COMMON: + return entry->hdr->common.type; + case ACPI_SUBTABLE_HMAT: + return entry->hdr->hmat.type; + case ACPI_SUBTABLE_PRMT: + return 0; + case ACPI_SUBTABLE_CEDT: + return entry->hdr->cedt.type; + } + return 0; +} + +static unsigned long __init_or_acpilib +acpi_get_entry_length(struct acpi_subtable_entry *entry) +{ + switch (entry->type) { + case ACPI_SUBTABLE_COMMON: + return entry->hdr->common.length; + case ACPI_SUBTABLE_HMAT: + return entry->hdr->hmat.length; + case ACPI_SUBTABLE_PRMT: + return entry->hdr->prmt.length; + case ACPI_SUBTABLE_CEDT: + return entry->hdr->cedt.length; + } + return 0; +} + +static unsigned long __init_or_acpilib +acpi_get_subtable_header_length(struct acpi_subtable_entry *entry) +{ + switch (entry->type) { + case ACPI_SUBTABLE_COMMON: + return sizeof(entry->hdr->common); + case ACPI_SUBTABLE_HMAT: + return sizeof(entry->hdr->hmat); + case ACPI_SUBTABLE_PRMT: + return sizeof(entry->hdr->prmt); + case ACPI_SUBTABLE_CEDT: + return sizeof(entry->hdr->cedt); + } + return 0; +} + +static enum acpi_subtable_type __init_or_acpilib +acpi_get_subtable_type(char *id) +{ + if (strncmp(id, ACPI_SIG_HMAT, 4) == 0) + return ACPI_SUBTABLE_HMAT; + if (strncmp(id, ACPI_SIG_PRMT, 4) == 0) + return ACPI_SUBTABLE_PRMT; + if (strncmp(id, ACPI_SIG_CEDT, 4) == 0) + return ACPI_SUBTABLE_CEDT; + return ACPI_SUBTABLE_COMMON; +} + +static __init_or_acpilib bool has_handler(struct acpi_subtable_proc *proc) +{ + return proc->handler || proc->handler_arg; +} + +static __init_or_acpilib int call_handler(struct acpi_subtable_proc *proc, + union acpi_subtable_headers *hdr, + unsigned long end) +{ + if (proc->handler) + return proc->handler(hdr, end); + if (proc->handler_arg) + return proc->handler_arg(hdr, proc->arg, end); + return -EINVAL; +} + +/** + * acpi_parse_entries_array - for each proc_num find a suitable subtable + * + * @id: table id (for debugging purposes) + * @table_size: size of the root table + * @table_header: where does the table start? + * @proc: array of acpi_subtable_proc struct containing entry id + * and associated handler with it + * @proc_num: how big proc is? + * @max_entries: how many entries can we process? + * + * For each proc_num find a subtable with proc->id and run proc->handler + * on it. Assumption is that there's only single handler for particular + * entry id. + * + * The table_size is not the size of the complete ACPI table (the length + * field in the header struct), but only the size of the root table; i.e., + * the offset from the very first byte of the complete ACPI table, to the + * first byte of the very first subtable. + * + * On success returns sum of all matching entries for all proc handlers. + * Otherwise, -ENODEV or -EINVAL is returned. + */ +int __init_or_acpilib +acpi_parse_entries_array(char *id, unsigned long table_size, + struct acpi_table_header *table_header, + struct acpi_subtable_proc *proc, + int proc_num, unsigned int max_entries) +{ + unsigned long table_end, subtable_len, entry_len; + struct acpi_subtable_entry entry; + int count = 0; + int errs = 0; + int i; + + table_end = (unsigned long)table_header + table_header->length; + + /* Parse all entries looking for a match. */ + + entry.type = acpi_get_subtable_type(id); + entry.hdr = (union acpi_subtable_headers *) + ((unsigned long)table_header + table_size); + subtable_len = acpi_get_subtable_header_length(&entry); + + while (((unsigned long)entry.hdr) + subtable_len < table_end) { + if (max_entries && count >= max_entries) + break; + + for (i = 0; i < proc_num; i++) { + if (acpi_get_entry_type(&entry) != proc[i].id) + continue; + if (!has_handler(&proc[i]) || + (!errs && + call_handler(&proc[i], entry.hdr, table_end))) { + errs++; + continue; + } + + proc[i].count++; + break; + } + if (i != proc_num) + count++; + + /* + * If entry->length is 0, break from this loop to avoid + * infinite loop. + */ + entry_len = acpi_get_entry_length(&entry); + if (entry_len == 0) { + pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id); + return -EINVAL; + } + + entry.hdr = (union acpi_subtable_headers *) + ((unsigned long)entry.hdr + entry_len); + } + + if (max_entries && count > max_entries) { + pr_warn("[%4.4s:0x%02x] found the maximum %i entries\n", + id, proc->id, count); + } + + return errs ? -EINVAL : count; +} +EXPORT_SYMBOL_GPL(acpi_parse_entries_array); From patchwork Wed Jun 14 21:48:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 13280477 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 E6814EB64D8 for ; Wed, 14 Jun 2023 21:48:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231721AbjFNVsR (ORCPT ); Wed, 14 Jun 2023 17:48:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49564 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235703AbjFNVsN (ORCPT ); Wed, 14 Jun 2023 17:48:13 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 86C152690; Wed, 14 Jun 2023 14:48:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1686779292; x=1718315292; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=cw/QhAdjWl7JffXxMm5aaEooruas6iuC7iOV6O8jfFs=; b=gIpPjdIR0jJoAu2yh16aHFDHnyJnXr1OabEzMJJKP8m22/tGjW3rZ+JJ HTKBfCRKXS9PoWjDRXLEwyby1Er3AoH6gKmuztEkNhAtbsB1H7FQgDxYt 5WTXhxenysktQe5F0ZIXc0EVkJd/bvrHPqzh+UrTmb/m4HTDoRS+R7kv9 RaNcN3vuZVNCYvd1fm4AFgihGSCBcddJzoZL31UJRvqLrFHLL4AZroRca 0azgeNDpW8Z0nT/bb0UU7S88dHu3gRYK8J2aKdhdzXiEF7pH7cov4mGdT ImjNCK/QFMb7QAIgLuYcte4r5SE4Jwo5IQZHa8LHRmaiFUp87Ljy5cXcB w==; X-IronPort-AV: E=McAfee;i="6600,9927,10741"; a="357624234" X-IronPort-AV: E=Sophos;i="6.00,243,1681196400"; d="scan'208";a="357624234" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2023 14:48:12 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10741"; a="715366004" X-IronPort-AV: E=Sophos;i="6.00,243,1681196400"; d="scan'208";a="715366004" Received: from djiang5-mobl3.amr.corp.intel.com (HELO [192.168.1.177]) ([10.212.110.39]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2023 14:48:11 -0700 Subject: [PATCH v4 2/4] lib/firmware_table: tables: Add CDAT table parsing support From: Dave Jiang To: linux-acpi@vger.kernel.org, linux-cxl@vger.kernel.org Cc: "Rafael J. Wysocki" , Len Brown , Jonathan Cameron , "Rafael J. Wysocki" , rafael@kernel.org, lenb@kernel.org, dan.j.williams@intel.com, ira.weiny@intel.com, vishal.l.verma@intel.com, alison.schofield@intel.com, lukas@wunner.de, Jonathan.Cameron@huawei.com, guohanjun@huawei.com Date: Wed, 14 Jun 2023 14:48:11 -0700 Message-ID: <168677929102.2787985.16025973208700705746.stgit@djiang5-mobl3> In-Reply-To: <168677921156.2787985.6927511816148622557.stgit@djiang5-mobl3> References: <168677921156.2787985.6927511816148622557.stgit@djiang5-mobl3> User-Agent: StGit/1.5 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org The CDAT table is very similar to ACPI tables when it comes to sub-table and entry structures. The helper functions can be also used to parse the CDAT table. Add support to the helper functions to deal with an external CDAT table, and also handle the endieness since CDAT can be processed by a BE host. Export a function cdat_table_parse() for CXL driver to parse a CDAT table. In order to minimize ACPICA code changes, __force is being utilized to deal with the case of a big endian (BE) host parsing a CDAT. All CDAT data structure variables are being force casted to __leX as appropriate. Cc: Rafael J. Wysocki Cc: Len Brown Reviewed-by: Jonathan Cameron Signed-off-by: Dave Jiang Acked-by: Rafael J. Wysocki --- v4: - Add {} in acpi_get_entry_length() to fix 0-day failure. v3: Rafael, Attempted to rename acpi_ prefix to something common but that ended up causing a significant amount of ACPI code changes. I'll leave that alone unless you'd like me to go that direction. v2: - Make acpi_table_header and acpi_table_cdat a union. (Jonathan) - Use local var to make acpi_table_get_length() more readable. (Jonathan) - Remove ACPI_SIG_CDAT define, already defined. --- drivers/acpi/tables.c | 5 +++- include/linux/fw_table.h | 11 +++++++++ lib/fw_table.c | 54 +++++++++++++++++++++++++++++++++++++++++++--- 3 files changed, 64 insertions(+), 6 deletions(-) diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c index cfc76efd8788..d4c7a76a0fce 100644 --- a/drivers/acpi/tables.c +++ b/drivers/acpi/tables.c @@ -241,8 +241,9 @@ int __init_or_acpilib acpi_table_parse_entries_array( return -ENODEV; } - count = acpi_parse_entries_array(id, table_size, table_header, - proc, proc_num, max_entries); + count = acpi_parse_entries_array(id, table_size, + (union fw_table_header *)table_header, + proc, proc_num, max_entries); acpi_put_table(table_header); return count; diff --git a/include/linux/fw_table.h b/include/linux/fw_table.h index ff8fa58d5818..a97d368df520 100644 --- a/include/linux/fw_table.h +++ b/include/linux/fw_table.h @@ -28,16 +28,25 @@ struct acpi_subtable_proc { #include #include +union fw_table_header { + struct acpi_table_header acpi; + struct acpi_table_cdat cdat; +}; + union acpi_subtable_headers { struct acpi_subtable_header common; struct acpi_hmat_structure hmat; struct acpi_prmt_module_header prmt; struct acpi_cedt_header cedt; + struct acpi_cdat_header cdat; }; int acpi_parse_entries_array(char *id, unsigned long table_size, - struct acpi_table_header *table_header, + union fw_table_header *table_header, struct acpi_subtable_proc *proc, int proc_num, unsigned int max_entries); +int cdat_table_parse(enum acpi_cdat_type type, + acpi_tbl_entry_handler_arg handler_arg, void *arg, + struct acpi_table_cdat *table_header); #endif diff --git a/lib/fw_table.c b/lib/fw_table.c index e84bd0866e10..108f1db3f1a6 100644 --- a/lib/fw_table.c +++ b/lib/fw_table.c @@ -18,6 +18,7 @@ enum acpi_subtable_type { ACPI_SUBTABLE_HMAT, ACPI_SUBTABLE_PRMT, ACPI_SUBTABLE_CEDT, + CDAT_SUBTABLE, }; struct acpi_subtable_entry { @@ -37,6 +38,8 @@ acpi_get_entry_type(struct acpi_subtable_entry *entry) return 0; case ACPI_SUBTABLE_CEDT: return entry->hdr->cedt.type; + case CDAT_SUBTABLE: + return entry->hdr->cdat.type; } return 0; } @@ -53,6 +56,11 @@ acpi_get_entry_length(struct acpi_subtable_entry *entry) return entry->hdr->prmt.length; case ACPI_SUBTABLE_CEDT: return entry->hdr->cedt.length; + case CDAT_SUBTABLE: { + __le16 length = (__force __le16)entry->hdr->cdat.length; + + return le16_to_cpu(length); + } } return 0; } @@ -69,6 +77,8 @@ acpi_get_subtable_header_length(struct acpi_subtable_entry *entry) return sizeof(entry->hdr->prmt); case ACPI_SUBTABLE_CEDT: return sizeof(entry->hdr->cedt); + case CDAT_SUBTABLE: + return sizeof(entry->hdr->cdat); } return 0; } @@ -82,9 +92,24 @@ acpi_get_subtable_type(char *id) return ACPI_SUBTABLE_PRMT; if (strncmp(id, ACPI_SIG_CEDT, 4) == 0) return ACPI_SUBTABLE_CEDT; + if (strncmp(id, ACPI_SIG_CDAT, 4) == 0) + return CDAT_SUBTABLE; return ACPI_SUBTABLE_COMMON; } +static unsigned long __init_or_acpilib +acpi_table_get_length(enum acpi_subtable_type type, + union fw_table_header *header) +{ + if (type == CDAT_SUBTABLE) { + __le32 length = (__force __le32)header->cdat.length; + + return le32_to_cpu(length); + } + + return header->acpi.length; +} + static __init_or_acpilib bool has_handler(struct acpi_subtable_proc *proc) { return proc->handler || proc->handler_arg; @@ -126,21 +151,24 @@ static __init_or_acpilib int call_handler(struct acpi_subtable_proc *proc, */ int __init_or_acpilib acpi_parse_entries_array(char *id, unsigned long table_size, - struct acpi_table_header *table_header, + union fw_table_header *table_header, struct acpi_subtable_proc *proc, int proc_num, unsigned int max_entries) { unsigned long table_end, subtable_len, entry_len; struct acpi_subtable_entry entry; + enum acpi_subtable_type type; int count = 0; int errs = 0; int i; - table_end = (unsigned long)table_header + table_header->length; + type = acpi_get_subtable_type(id); + table_end = (unsigned long)table_header + + acpi_table_get_length(type, table_header); /* Parse all entries looking for a match. */ - entry.type = acpi_get_subtable_type(id); + entry.type = type; entry.hdr = (union acpi_subtable_headers *) ((unsigned long)table_header + table_size); subtable_len = acpi_get_subtable_header_length(&entry); @@ -187,3 +215,23 @@ acpi_parse_entries_array(char *id, unsigned long table_size, return errs ? -EINVAL : count; } EXPORT_SYMBOL_GPL(acpi_parse_entries_array); + +int cdat_table_parse(enum acpi_cdat_type type, + acpi_tbl_entry_handler_arg handler_arg, void *arg, + struct acpi_table_cdat *table_header) +{ + struct acpi_subtable_proc proc = { + .id = type, + .handler_arg = handler_arg, + .arg = arg, + }; + + if (!table_header) + return -EINVAL; + + return acpi_parse_entries_array(ACPI_SIG_CDAT, + sizeof(struct acpi_table_cdat), + (union fw_table_header *)table_header, + &proc, 1, 0); +} +EXPORT_SYMBOL_NS_GPL(cdat_table_parse, CXL); From patchwork Wed Jun 14 21:48:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 13280478 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 D6D15EB64D8 for ; Wed, 14 Jun 2023 21:48:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235600AbjFNVsW (ORCPT ); Wed, 14 Jun 2023 17:48:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49594 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230178AbjFNVsT (ORCPT ); Wed, 14 Jun 2023 17:48:19 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7FAB6268C; Wed, 14 Jun 2023 14:48:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1686779298; x=1718315298; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=LBNArsLwwppyPXWARVS5buh24Hqnq9o+Jj2eaRkIogk=; b=F474lobyTiNGSQ4hKpMf4nw/Bphlsv9sz60kI1V4mDJI5TQ7jewg0Bb2 iFYf8LD4AICYCfXsN9Wjyl2ITzUtpY8yAHD5ikyQLOxoHVPmEAosHKZLC 8wE85WRY1sYAqTAlwcQBVj12euYKT4LBB0TiVM4CVqvGUOrFAobjItOXw 5Ne9ypGd9pIOL8iYmnKDbiz8L0K3RwO7JbSk1nn12G5S/8Wu6102fMtbO 1t5xuZTnQbw8K/Muq8YzCG2yd4snhWVhNwy8j+6U55MJNeN1WDIJocixJ 5kgH+z1uQQnt642VnPJ9ItfrnZL+Dsp0NNAqcRwwT6egxgjW4jsLZmrht Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10741"; a="357624249" X-IronPort-AV: E=Sophos;i="6.00,243,1681196400"; d="scan'208";a="357624249" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2023 14:48:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10741"; a="715366012" X-IronPort-AV: E=Sophos;i="6.00,243,1681196400"; d="scan'208";a="715366012" Received: from djiang5-mobl3.amr.corp.intel.com (HELO [192.168.1.177]) ([10.212.110.39]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2023 14:48:17 -0700 Subject: [PATCH v4 3/4] acpi: fix misnamed define for CDAT DSMAS From: Dave Jiang To: linux-acpi@vger.kernel.org, linux-cxl@vger.kernel.org Cc: "Rafael J. Wysocki" , Len Brown , Jonathan Cameron , "Rafael J. Wysocki" , rafael@kernel.org, lenb@kernel.org, dan.j.williams@intel.com, ira.weiny@intel.com, vishal.l.verma@intel.com, alison.schofield@intel.com, lukas@wunner.de, Jonathan.Cameron@huawei.com, guohanjun@huawei.com Date: Wed, 14 Jun 2023 14:48:17 -0700 Message-ID: <168677929734.2787985.10830491440007394080.stgit@djiang5-mobl3> In-Reply-To: <168677921156.2787985.6927511816148622557.stgit@djiang5-mobl3> References: <168677921156.2787985.6927511816148622557.stgit@djiang5-mobl3> User-Agent: StGit/1.5 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org ACPI_CEDT_DSMAS_NON_VOLATILE should be defined as ACPI_CDAT_DSMAS_NON_VOLATILE. Fix misspelled define. Links: https://github.com/acpica/acpica/pull/874 Cc: Rafael J. Wysocki Cc: Len Brown Reviewed-by: Jonathan Cameron Signed-off-by: Dave Jiang Acked-by: Rafael J. Wysocki --- --- include/acpi/actbl1.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h index 58b0490a2ad1..8d5572ad48cb 100644 --- a/include/acpi/actbl1.h +++ b/include/acpi/actbl1.h @@ -402,7 +402,7 @@ struct acpi_cdat_dsmas { /* Flags for subtable above */ -#define ACPI_CEDT_DSMAS_NON_VOLATILE (1 << 2) +#define ACPI_CDAT_DSMAS_NON_VOLATILE (1 << 2) /* Subtable 1: Device scoped Latency and Bandwidth Information Structure (DSLBIS) */ From patchwork Wed Jun 14 21:48:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 13280479 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 CF6D6EB64DC for ; Wed, 14 Jun 2023 21:48:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235844AbjFNVsZ (ORCPT ); Wed, 14 Jun 2023 17:48:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49624 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230178AbjFNVsZ (ORCPT ); Wed, 14 Jun 2023 17:48:25 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 84B28268F; Wed, 14 Jun 2023 14:48:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1686779304; x=1718315304; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=BlBJs6J2Ig0B77uN9ly6Nsq9/OB13grYX/N1Pr3I6jg=; b=Wdd+DZbG9qrIu51VICWKRvd+/5OpXX3FZ/KrFACVOobUMyVahs2DcmFo 0ZuRnDImVOxUi6LYXFWQ+d40vT6R/aN67VEbG/xf/qK6298pTIh8oJn2V iX8DUj0b7aZE/+/2pF2Egs+FSg0swolLqiY9rqekQIH/4saqzRmscrprT Yf6Q9yBp8uCklYoS+LQFOQxdVIxZrVPPFLggk2Ig5s/cfdWcSJVsqxIU4 KBC052Bi8N/fYO58JHDV7/f5zymvBKiN2va71xHa73Zw7Tqv9ohi/3TCt tfx4ZulJ8lpZCCQfi14IM0PJlpvDFzF3qcFctthQk/0S+0rMHCaFzcM3t A==; X-IronPort-AV: E=McAfee;i="6600,9927,10741"; a="357624264" X-IronPort-AV: E=Sophos;i="6.00,243,1681196400"; d="scan'208";a="357624264" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2023 14:48:24 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10741"; a="715366017" X-IronPort-AV: E=Sophos;i="6.00,243,1681196400"; d="scan'208";a="715366017" Received: from djiang5-mobl3.amr.corp.intel.com (HELO [192.168.1.177]) ([10.212.110.39]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jun 2023 14:48:23 -0700 Subject: [PATCH v4 4/4] acpi: Add defines for CDAT SSLBIS From: Dave Jiang To: linux-acpi@vger.kernel.org, linux-cxl@vger.kernel.org Cc: Jonathan Cameron , "Rafael J. Wysocki" , rafael@kernel.org, lenb@kernel.org, dan.j.williams@intel.com, ira.weiny@intel.com, vishal.l.verma@intel.com, alison.schofield@intel.com, lukas@wunner.de, Jonathan.Cameron@huawei.com, guohanjun@huawei.com Date: Wed, 14 Jun 2023 14:48:23 -0700 Message-ID: <168677930330.2787985.15866363373310739456.stgit@djiang5-mobl3> In-Reply-To: <168677921156.2787985.6927511816148622557.stgit@djiang5-mobl3> References: <168677921156.2787985.6927511816148622557.stgit@djiang5-mobl3> User-Agent: StGit/1.5 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org Add upstream port and any port definition for SSLBIS. Links: https://github.com/acpica/acpica/pull/874 Reviewed-by: Jonathan Cameron Signed-off-by: Dave Jiang Acked-by: Rafael J. Wysocki --- --- include/acpi/actbl1.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h index 8d5572ad48cb..a33375e055ad 100644 --- a/include/acpi/actbl1.h +++ b/include/acpi/actbl1.h @@ -465,6 +465,9 @@ struct acpi_cdat_sslbe { u16 reserved; }; +#define ACPI_CDAT_SSLBIS_US_PORT 0x0100 +#define ACPI_CDAT_SSLBIS_ANY_PORT 0xffff + /******************************************************************************* * * CEDT - CXL Early Discovery Table