From patchwork Thu Jun 1 21:31:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 13264448 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 728FDC77B7E for ; Thu, 1 Jun 2023 21:31:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232402AbjFAVb5 (ORCPT ); Thu, 1 Jun 2023 17:31:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50148 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231213AbjFAVb5 (ORCPT ); Thu, 1 Jun 2023 17:31:57 -0400 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 67B07195; Thu, 1 Jun 2023 14:31:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685655114; x=1717191114; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=whlfnvWzu1+2Vn7v2lrRRkGzH81UIdjR6iFEKRCIzLs=; b=YvxqJDoAoSjWlhUcJE3lKwU/EvOByIiRW375sJr4BbU/abU+xWFd5cLV NZ2/CUw/fWO4lFfrtyBltQs7NBr0WezgDfrI8GY12RlEWvO96SL5WnywD f4eMRNI88lcxwPA0Su8sUN/qciwjL4QTlb00ELqOhaB3jBXZOdQTcYGI1 n9N5oI15jGpXnymUs2kXy+nbPnmmvE+5Dydhd2/khbgT+PQ7PVo8foav2 2OUrljPp09Yqie4tpG7IqUunvF18xyH7UPkJfSnnqKPNOQy8dxtNWX9mD J25lAh9E0d0FSE+jyjwV8D0fR2CpQVl4fDYh+KeR5uJaxp7tf+QTd49pN A==; X-IronPort-AV: E=McAfee;i="6600,9927,10728"; a="421507411" X-IronPort-AV: E=Sophos;i="6.00,210,1681196400"; d="scan'208";a="421507411" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jun 2023 14:31:53 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10728"; a="685016411" X-IronPort-AV: E=Sophos;i="6.00,210,1681196400"; d="scan'208";a="685016411" Received: from djiang5-mobl3.amr.corp.intel.com (HELO [192.168.1.177]) ([10.212.26.132]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jun 2023 14:31:53 -0700 Subject: [PATCH v3 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@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 Date: Thu, 01 Jun 2023 14:31:52 -0700 Message-ID: <168565511236.1098279.11767193165079131197.stgit@djiang5-mobl3> In-Reply-To: <168565502116.1098279.131831312990693128.stgit@djiang5-mobl3> References: <168565502116.1098279.131831312990693128.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 Reviewed-by: Jonathan Cameron --- --- drivers/acpi/Kconfig | 1 drivers/acpi/tables.c | 173 ------------------------------------------ include/linux/acpi.h | 22 ----- include/linux/fw_table.h | 43 ++++++++++ lib/Kconfig | 3 + lib/Makefile | 2 lib/fw_table.c | 189 ++++++++++++++++++++++++++++++++++++++++++++++ 7 files changed, 239 insertions(+), 194 deletions(-) create mode 100644 include/linux/fw_table.h create mode 100644 lib/fw_table.c 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..57004cd0a7a3 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; @@ -132,21 +133,8 @@ 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 +208,6 @@ 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); 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 Thu Jun 1 21:31:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 13264449 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 EBE6FC7EE23 for ; Thu, 1 Jun 2023 21:32:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231213AbjFAVcG (ORCPT ); Thu, 1 Jun 2023 17:32:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50186 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232229AbjFAVcF (ORCPT ); Thu, 1 Jun 2023 17:32:05 -0400 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9A36C19A; Thu, 1 Jun 2023 14:32:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685655120; x=1717191120; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=lpZ4n0fhfuIV+oImvyZ7HaKArddS3EZhg6GMiGR0mxI=; b=Qi4/SQqWW1XOraybCXGapANIyo6pwE+N+L8X71ME/exnZJ52nWoP/9uO Ub89OcCzBOB0UeapbhjqxQAVU2U5NM/J/YrNPL3N5tNoo20z3li/jGu5P +0z+v0Czcfq8FdqAkhqq/rUE1GHVpuhcGCIpq/WUP4acQK6nE4Evjnb8u OklbZ/xVWS+olIdvkB7BqDHDhhvz8GzJeHkE0bxGVbMbysR/OQqVctWC6 4amvyWHoinbibIJaBpJXTlCxmDBaXt/NklESx7sxiwiVMlWn7GOVCqBgc bjPDEQAJ2l7h5tYqJwH4gpn4ho+ALuQZsa4BOa1+Uw5oqF+B2TsxTf7hR Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10728"; a="421507444" X-IronPort-AV: E=Sophos;i="6.00,210,1681196400"; d="scan'208";a="421507444" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jun 2023 14:32:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10728"; a="685016422" X-IronPort-AV: E=Sophos;i="6.00,210,1681196400"; d="scan'208";a="685016422" Received: from djiang5-mobl3.amr.corp.intel.com (HELO [192.168.1.177]) ([10.212.26.132]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jun 2023 14:31:59 -0700 Subject: [PATCH v3 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 , 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 Date: Thu, 01 Jun 2023 14:31:58 -0700 Message-ID: <168565511896.1098279.8010082917678621299.stgit@djiang5-mobl3> In-Reply-To: <168565502116.1098279.131831312990693128.stgit@djiang5-mobl3> References: <168565502116.1098279.131831312990693128.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 Signed-off-by: Dave Jiang Reviewed-by: Jonathan Cameron --- 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 | 53 +++++++++++++++++++++++++++++++++++++++++++--- 3 files changed, 63 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..abf71bdb109a 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 +56,10 @@ 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 +76,8 @@ 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 +91,24 @@ 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 +150,24 @@ 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 +214,23 @@ 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 Thu Jun 1 21:32:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 13264450 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 DA5E5C7EE23 for ; Thu, 1 Jun 2023 21:32:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232229AbjFAVcL (ORCPT ); Thu, 1 Jun 2023 17:32:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50200 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229610AbjFAVcI (ORCPT ); Thu, 1 Jun 2023 17:32:08 -0400 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EEB6C195; Thu, 1 Jun 2023 14:32:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685655127; x=1717191127; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DXQR/Lpo+Y73F2vX/Z1uBGRi7w60gV47PBhBhCqh8lI=; b=iMdszhwYo1TezYpm/uYaIGL9zkM2pUHM//W8mpXoYuzR9VQznRjL5eJO xFi9ElGTfGGwJ2SDiif58+oIT3QVrCBy72fIoT7umkWTIx1hA2tBVXsEo Cks7hJpowhvt+Kt15GsjdBkBhZcgClGleJ5XMGKj9ZFLmz39eP/LA7PHw Dg/wGl9hoJgs2J8huyNRmIdEzevfU9IKhkg5KJ4y+8ZePXXSEcQy8AUqd dnvMMwGBZ/7tPuvnsTbm8CEaXcalKmcJ9c3Y0aQ/Lopb7Tk4CHr3lKtbk mVsfdfDuNt/Q1oc8ttaZiUnr4UQvzEFYOt5TFzJdcBIEbpRd72Le7D9+8 g==; X-IronPort-AV: E=McAfee;i="6600,9927,10728"; a="421507472" X-IronPort-AV: E=Sophos;i="6.00,210,1681196400"; d="scan'208";a="421507472" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jun 2023 14:32:06 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10728"; a="777376583" X-IronPort-AV: E=Sophos;i="6.00,210,1681196400"; d="scan'208";a="777376583" Received: from djiang5-mobl3.amr.corp.intel.com (HELO [192.168.1.177]) ([10.212.26.132]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jun 2023 14:32:05 -0700 Subject: [PATCH v3 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 , 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 Date: Thu, 01 Jun 2023 14:32:05 -0700 Message-ID: <168565512544.1098279.10448422511551990530.stgit@djiang5-mobl3> In-Reply-To: <168565502116.1098279.131831312990693128.stgit@djiang5-mobl3> References: <168565502116.1098279.131831312990693128.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 Signed-off-by: Dave Jiang Reviewed-by: Jonathan Cameron --- --- 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 Thu Jun 1 21:32:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Jiang X-Patchwork-Id: 13264451 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 A8660C77B7E for ; Thu, 1 Jun 2023 21:32:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232430AbjFAVcP (ORCPT ); Thu, 1 Jun 2023 17:32:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50242 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232441AbjFAVcO (ORCPT ); Thu, 1 Jun 2023 17:32:14 -0400 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B9770196; Thu, 1 Jun 2023 14:32:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1685655132; x=1717191132; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=BEEjOAqfF2uEYyYA/Yp2b7+pHYEv7kWDqY/xkDccu8A=; b=bb0gEIhtX+MjP74ch+zcLxAbCUTEA5g4gKa49DIzj6Vc/01Va1XW0c2K QSGnXXbOB45VXaVWKTjO1ueliZnGzPM89f1DYNvUgcoQ7KkowmV8w1JQX kX1E6CBoNqoI6iKQHywdgqZlrCFEQPu15l/i7gZfe5Ej7DPKRIabaLU1b b7gFL/ZSJUtZYhjYiZdNO79UOmq9KCJGdNjDH7HiOYBi+aGGyOHPza0Qh w59j+5Z0Onj1lMfInNIzkesLwMs1Qa/fN+qNBgJ7PPrEtuBQ9gnsZiSnx rU1kymGf5CdO7i0GdxVfpntRZrfWx5sKZJex/aggd1XybzvOkKlf4ZEbO g==; X-IronPort-AV: E=McAfee;i="6600,9927,10728"; a="421507510" X-IronPort-AV: E=Sophos;i="6.00,210,1681196400"; d="scan'208";a="421507510" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jun 2023 14:32:12 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10728"; a="777376614" X-IronPort-AV: E=Sophos;i="6.00,210,1681196400"; d="scan'208";a="777376614" Received: from djiang5-mobl3.amr.corp.intel.com (HELO [192.168.1.177]) ([10.212.26.132]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jun 2023 14:32:11 -0700 Subject: [PATCH v3 4/4] acpi: Add defines for CDAT SSLBIS From: Dave Jiang To: linux-acpi@vger.kernel.org, linux-cxl@vger.kernel.org Cc: 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 Date: Thu, 01 Jun 2023 14:32:11 -0700 Message-ID: <168565513141.1098279.7310204214131055216.stgit@djiang5-mobl3> In-Reply-To: <168565502116.1098279.131831312990693128.stgit@djiang5-mobl3> References: <168565502116.1098279.131831312990693128.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 Signed-off-by: Dave Jiang Reviewed-by: Jonathan Cameron --- --- 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