Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754084AbaACAHu (ORCPT ); Thu, 2 Jan 2014 19:07:50 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:23704 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753849AbaACAHp (ORCPT ); Thu, 2 Jan 2014 19:07:45 -0500 From: Yinghai Lu To: "H. Peter Anvin" , Tony Luck , Bjorn Helgaas , "Rafael J. Wysocki" , x86 Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Yinghai Lu , Len Brown Subject: [PATCH v2 05/10] ACPI: Add acpi_run_dsm() Date: Thu, 2 Jan 2014 16:08:12 -0800 Message-Id: <1388707697-16800-6-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1388707697-16800-1-git-send-email-yinghai@kernel.org> References: <1388707697-16800-1-git-send-email-yinghai@kernel.org> X-Source-IP: acsinet21.oracle.com [141.146.126.237] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3852 Lines: 128 Will need to use that get dmar entries for hotplug Signed-off-by: Yinghai Lu Cc: Len Brown Cc: Rafael J. Wysocki Cc: linux-acpi@vger.kernel.org --- drivers/acpi/bus.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++ include/linux/acpi.h | 10 +++++++ 2 files changed, 87 insertions(+) diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index bba9b72..14d18d3 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -283,6 +283,83 @@ out_kfree: } EXPORT_SYMBOL(acpi_run_osc); +static void acpi_print_dsm_error(acpi_handle handle, + struct acpi_dsm_context *context, char *error) +{ + struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; + + if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) + printk(KERN_DEBUG "%s for idx %x\n", error, context->func_idx); + else { + printk(KERN_DEBUG "%s:%s for idx %x\n", + (char *)buffer.pointer, error, context->func_idx); + kfree(buffer.pointer); + } +} + +acpi_status acpi_run_dsm(acpi_handle handle, struct acpi_dsm_context *context) +{ + acpi_status status; + struct acpi_object_list input; + union acpi_object in_params[4]; + union acpi_object *out_obj; + u8 uuid[16]; + struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; + + if (!context) + return AE_ERROR; + if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) + return AE_ERROR; + context->ret.length = ACPI_ALLOCATE_BUFFER; + context->ret.pointer = NULL; + + /* Setting up input parameters */ + input.count = 4; + input.pointer = in_params; + in_params[0].type = ACPI_TYPE_BUFFER; + in_params[0].buffer.length = 16; + in_params[0].buffer.pointer = uuid; + in_params[1].type = ACPI_TYPE_INTEGER; + in_params[1].integer.value = context->rev; + in_params[2].type = ACPI_TYPE_INTEGER; + in_params[2].integer.value = context->func_idx; + in_params[3].type = ACPI_TYPE_PACKAGE; + in_params[3].package.count = context->func_argc; + in_params[3].package.elements = context->func_argv; + + status = acpi_evaluate_object(handle, "_DSM", &input, &output); + if (ACPI_FAILURE(status)) + return status; + + if (!output.length) + return AE_NULL_OBJECT; + + out_obj = output.pointer; + if (out_obj->type != ACPI_TYPE_BUFFER) { + acpi_print_dsm_error(handle, context, + "_DSM evaluation returned wrong type"); + status = AE_TYPE; + goto out_kfree; + } + + context->ret.length = out_obj->buffer.length; + context->ret.pointer = kmalloc(context->ret.length, GFP_KERNEL); + if (!context->ret.pointer) { + status = AE_NO_MEMORY; + goto out_kfree; + } + memcpy(context->ret.pointer, out_obj->buffer.pointer, + context->ret.length); + status = AE_OK; + +out_kfree: + kfree(output.pointer); + if (status != AE_OK) + context->ret.pointer = NULL; + return status; +} +EXPORT_SYMBOL(acpi_run_dsm); + bool osc_sb_apei_support_acked; static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; static void acpi_bus_osc_support(void) diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 762980a..02daa9c 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -323,6 +323,16 @@ void __init acpi_nvs_nosave(void); void __init acpi_nvs_nosave_s3(void); #endif /* CONFIG_PM_SLEEP */ +struct acpi_dsm_context { + char *uuid_str; /* uuid string */ + int rev; + int func_idx; /* function index */ + int func_argc; + union acpi_object *func_argv; + struct acpi_buffer ret; /* free by caller if success */ +}; +acpi_status acpi_run_dsm(acpi_handle handle, struct acpi_dsm_context *context); + struct acpi_osc_context { char *uuid_str; /* UUID string */ int rev; -- 1.8.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/