From patchwork Thu Mar 17 08:32:59 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Guangrong X-Patchwork-Id: 598937 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3qQhbP4KLwz9s0M for ; Thu, 17 Mar 2016 19:38:57 +1100 (AEDT) Received: from localhost ([::1]:33362 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1agTSJ-0001Cv-MW for incoming@patchwork.ozlabs.org; Thu, 17 Mar 2016 04:38:55 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37576) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1agTMw-0006VF-0T for qemu-devel@nongnu.org; Thu, 17 Mar 2016 04:33:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1agTMu-0001Zx-U3 for qemu-devel@nongnu.org; Thu, 17 Mar 2016 04:33:21 -0400 Received: from mga14.intel.com ([192.55.52.115]:49128) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1agTMu-0001Sg-KO for qemu-devel@nongnu.org; Thu, 17 Mar 2016 04:33:20 -0400 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga103.fm.intel.com with ESMTP; 17 Mar 2016 01:33:20 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,349,1455004800"; d="scan'208";a="671127553" 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; 17 Mar 2016 01:33:18 -0700 From: Xiao Guangrong To: pbonzini@redhat.com, imammedo@redhat.com Date: Thu, 17 Mar 2016 16:32:59 +0800 Message-Id: <1458203581-59143-14-git-send-email-guangrong.xiao@linux.intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1458203581-59143-1-git-send-email-guangrong.xiao@linux.intel.com> References: <1458203581-59143-1-git-send-email-guangrong.xiao@linux.intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.115 Cc: Xiao Guangrong , ehabkost@redhat.com, kvm@vger.kernel.org, mst@redhat.com, gleb@kernel.org, mtosatti@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com, dan.j.williams@intel.com, rth@twiddle.net Subject: [Qemu-devel] [PATCH 13/15] nvdimm acpi: support Get Namespace Label Data function X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Function 5 is used to get Namespace Label Data Signed-off-by: Xiao Guangrong --- hw/acpi/nvdimm.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 80 insertions(+), 1 deletion(-) diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index 4b5f672..1240328 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -438,6 +438,14 @@ struct NvdimmFuncGetLabelSizeOut { typedef struct NvdimmFuncGetLabelSizeOut NvdimmFuncGetLabelSizeOut; QEMU_BUILD_BUG_ON(sizeof(NvdimmFuncGetLabelSizeOut) > TARGET_PAGE_SIZE); +struct NvdimmFuncGetLabelDataIn { + 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 NvdimmFuncGetLabelDataIn NvdimmFuncGetLabelDataIn; +QEMU_BUILD_BUG_ON(sizeof(NvdimmFuncGetLabelDataIn) + sizeof(NvdimmDsmIn) > + TARGET_PAGE_SIZE); + struct NvdimmFuncGetLabelDataOut { /* the size of buffer filled by QEMU. */ uint32_t len; @@ -445,6 +453,7 @@ struct NvdimmFuncGetLabelDataOut { uint8_t out_buf[0]; /* the data got via Get Namesapce Label function. */ } QEMU_PACKED; typedef struct NvdimmFuncGetLabelDataOut NvdimmFuncGetLabelDataOut; +QEMU_BUILD_BUG_ON(sizeof(NvdimmFuncGetLabelDataOut) > TARGET_PAGE_SIZE); struct NvdimmFuncSetLabelDataIn { uint32_t offset; /* the offset in the namespace label data area. */ @@ -539,6 +548,70 @@ static void nvdimm_dsm_label_size(NVDIMMDevice *nvdimm, hwaddr dsm_mem_addr) sizeof(label_size_out)); } +static uint32_t nvdimm_rw_label_data_check(NVDIMMDevice *nvdimm, + uint32_t offset, uint32_t length) +{ + uint32_t ret = 3 /* Invalid Input Parameters */; + + if (offset + length < offset) { + nvdimm_debug("offset %#x + length %#x is overflow.\n", offset, + length); + return ret; + } + + if (nvdimm->label_size < offset + length) { + nvdimm_debug("position %#x is beyond label data (len = %#lx).\n", + offset + length, nvdimm->label_size); + return ret; + } + + if (length > nvdimm_get_max_xfer_label_size()) { + nvdimm_debug("length (%#x) is larger than max_xfer (%#x).\n", + length, nvdimm_get_max_xfer_label_size()); + return ret; + } + + return 0 /* Success */; +} + +/* + * DSM Spec Rev1 4.5 Get Namespace Label Data (Function Index 5). + */ +static void nvdimm_dsm_get_label_data(NVDIMMDevice *nvdimm, NvdimmDsmIn *in, + hwaddr dsm_mem_addr) +{ + NVDIMMClass *nvc = NVDIMM_GET_CLASS(nvdimm); + NvdimmFuncGetLabelDataIn *get_label_data; + NvdimmFuncGetLabelDataOut *get_label_data_out; + uint32_t status; + int size; + + get_label_data = (NvdimmFuncGetLabelDataIn *)in->arg3; + le32_to_cpus(&get_label_data->offset); + le32_to_cpus(&get_label_data->length); + + nvdimm_debug("Read Label Data: offset %#x length %#x.\n", + get_label_data->offset, get_label_data->length); + + status = nvdimm_rw_label_data_check(nvdimm, get_label_data->offset, + get_label_data->length); + if (status != 0 /* Success */) { + return nvdimm_dsm_no_payload(status, dsm_mem_addr); + } + + size = sizeof(*get_label_data_out) + get_label_data->length; + assert(size <= TARGET_PAGE_SIZE); + get_label_data_out = g_malloc(size); + + get_label_data_out->len = cpu_to_le32(size); + get_label_data_out->func_ret_status = cpu_to_le32(0 /* Success */); + nvc->read_label_data(nvdimm, get_label_data_out->out_buf, + get_label_data->length, get_label_data->offset); + + cpu_physical_memory_write(dsm_mem_addr, get_label_data_out, size); + g_free(get_label_data_out); +} + static void nvdimm_dsm_device(NvdimmDsmIn *in, hwaddr dsm_mem_addr) { NVDIMMDevice *nvdimm = nvdimm_get_device_by_handle(in->handle); @@ -551,7 +624,8 @@ static void nvdimm_dsm_device(NvdimmDsmIn *in, hwaddr dsm_mem_addr) supported_func |= 0x1 /* Bit 0 indicates whether there is support for any functions other than function 0. */ | - 1 << 4 /* Get Namespace Label Size */; + 1 << 4 /* Get Namespace Label Size */ | + 1 << 5 /* Get Namespace Label Data */; } return nvdimm_dsm_function0(supported_func, dsm_mem_addr); } @@ -568,6 +642,11 @@ static void nvdimm_dsm_device(NvdimmDsmIn *in, hwaddr dsm_mem_addr) nvdimm_dsm_label_size(nvdimm, dsm_mem_addr); } break; + case 5 /* Get Namespace Label Data */: + if (nvdimm->reserve_label) { + nvdimm_dsm_get_label_data(nvdimm, in, dsm_mem_addr); + } + break; default: nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr); }