From patchwork Fri Oct 30 05:56:22 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Guangrong X-Patchwork-Id: 7524071 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0BC289F327 for ; Fri, 30 Oct 2015 06:03:06 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1E7552082A for ; Fri, 30 Oct 2015 06:03:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0FAC82081C for ; Fri, 30 Oct 2015 06:03:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758635AbbJ3GC5 (ORCPT ); Fri, 30 Oct 2015 02:02:57 -0400 Received: from mga11.intel.com ([192.55.52.93]:21826 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758638AbbJ3GCz (ORCPT ); Fri, 30 Oct 2015 02:02:55 -0400 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga102.fm.intel.com with ESMTP; 29 Oct 2015 23:02:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,217,1444719600"; d="scan'208";a="590814345" Received: from xiaoreal1.sh.intel.com (HELO xiaoreal1.sh.intel.com.sh.intel.com) ([10.239.48.79]) by FMSMGA003.fm.intel.com with ESMTP; 29 Oct 2015 23:02:53 -0700 From: Xiao Guangrong To: pbonzini@redhat.com, imammedo@redhat.com Cc: gleb@kernel.org, mtosatti@redhat.com, stefanha@redhat.com, mst@redhat.com, rth@twiddle.net, ehabkost@redhat.com, dan.j.williams@intel.com, kvm@vger.kernel.org, qemu-devel@nongnu.org, Xiao Guangrong Subject: [PATCH v6 28/33] nvdimm acpi: support Get Namespace Label Size function Date: Fri, 30 Oct 2015 13:56:22 +0800 Message-Id: <1446184587-142784-29-git-send-email-guangrong.xiao@linux.intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1446184587-142784-1-git-send-email-guangrong.xiao@linux.intel.com> References: <1446184587-142784-1-git-send-email-guangrong.xiao@linux.intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Function 4 is used to get Namespace label size Signed-off-by: Xiao Guangrong --- hw/acpi/nvdimm.c | 87 +++++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 86 insertions(+), 1 deletion(-) diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index 300a3aa..67c4699 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -407,15 +407,48 @@ enum { NVDIMM_DSM_DEV_STATUS_VENDOR_SPECIFIC_ERROR = 4, }; +struct NvdimmFuncInGetLabelData { + uint32_t offset; /* the offset in the namespace label data area. */ + uint32_t length; /* the size of data is to be read via the function. */ +} QEMU_PACKED; +typedef struct NvdimmFuncInGetLabelData NvdimmFuncInGetLabelData; + +struct NvdimmFuncInSetLabelData { + uint32_t offset; /* the offset in the namespace label data area. */ + uint32_t length; /* the size of data is to be written via the function. */ + uint8_t in_buf[0]; /* the data written to label data area. */ +} QEMU_PACKED; +typedef struct NvdimmFuncInSetLabelData NvdimmFuncInSetLabelData; + struct NvdimmDsmIn { uint32_t handle; uint32_t revision; uint32_t function; /* the remaining size in the page is used by arg3. */ - uint8_t arg3[0]; + union { + uint8_t arg3[0]; + NvdimmFuncInSetLabelData func_set_label_data; + }; } QEMU_PACKED; typedef struct NvdimmDsmIn NvdimmDsmIn; +struct NvdimmFuncOutLabelSize { + uint32_t status; /* return status code. */ + uint32_t label_size; /* the size of label data area. */ + /* + * Maximum size of the namespace label data length supported by + * the platform in Get/Set Namespace Label Data functions. + */ + uint32_t max_xfer; +} QEMU_PACKED; +typedef struct NvdimmFuncOutLabelSize NvdimmFuncOutLabelSize; + +struct NvdimmFuncOutGetLabelData { + uint32_t status; /*return status code. */ + uint8_t out_buf[0]; /* the data got via Get Namesapce Label function. */ +} QEMU_PACKED; +typedef struct NvdimmFuncOutGetLabelData NvdimmFuncOutGetLabelData; + static void nvdimm_dsm_write_status(GArray *out, uint32_t status) { status = cpu_to_le32(status); @@ -445,6 +478,55 @@ static void nvdimm_dsm_root(NvdimmDsmIn *in, GArray *out) nvdimm_dsm_write_status(out, status); } +/* + * the max transfer size is the max size transferred by both a + * 'Get Namespace Label Data' function and a 'Set Namespace Label Data' + * function. + */ +static uint32_t nvdimm_get_max_xfer_label_size(void) +{ + NvdimmDsmIn *in; + uint32_t max_get_size, max_set_size, dsm_memory_size = TARGET_PAGE_SIZE; + + /* + * the max data ACPI can read one time which is transferred by + * the response of 'Get Namespace Label Data' function. + */ + max_get_size = dsm_memory_size - sizeof(NvdimmFuncOutGetLabelData); + + /* + * the max data ACPI can write one time which is transferred by + * 'Set Namespace Label Data' function. + */ + max_set_size = dsm_memory_size - offsetof(NvdimmDsmIn, arg3) - + sizeof(in->func_set_label_data); + + return MIN(max_get_size, max_set_size); +} + +/* + * DSM Spec Rev1 4.4 Get Namespace Label Size (Function Index 4). + * + * It gets the size of Namespace Label data area and the max data size + * that Get/Set Namespace Label Data functions can transfer. + */ +static void nvdimm_dsm_func_label_size(NVDIMMDevice *nvdimm, GArray *out) +{ + NvdimmFuncOutLabelSize func_label_size; + uint32_t label_size, mxfer; + + label_size = nvdimm->label_size; + mxfer = nvdimm_get_max_xfer_label_size(); + + nvdimm_debug("label_size %#x, max_xfer %#x.\n", label_size, mxfer); + + func_label_size.status = cpu_to_le32(NVDIMM_DSM_STATUS_SUCCESS); + func_label_size.label_size = cpu_to_le32(label_size); + func_label_size.max_xfer = cpu_to_le32(mxfer); + + g_array_append_vals(out, &func_label_size, sizeof(func_label_size)); +} + static void nvdimm_dsm_device(NvdimmDsmIn *in, GArray *out) { GSList *list = nvdimm_get_plugged_device_list(); @@ -469,6 +551,9 @@ static void nvdimm_dsm_device(NvdimmDsmIn *in, GArray *out) 1 << 6 /* Set Namespace Label Data */); build_append_int_noprefix(out, cmd_list, sizeof(cmd_list)); goto free; + case 0x4 /* Get Namespace Label Size */: + nvdimm_dsm_func_label_size(nvdimm, out); + goto free; default: status = NVDIMM_DSM_STATUS_NOT_SUPPORTED; };