From patchwork Wed Oct 28 22:26:26 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Guangrong X-Patchwork-Id: 537390 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 A1609141304 for ; Thu, 29 Oct 2015 01:50:07 +1100 (AEDT) Received: from localhost ([::1]:38492 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZrS3B-0000un-Cx for incoming@patchwork.ozlabs.org; Wed, 28 Oct 2015 10:50:05 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54959) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZrRmZ-00061i-4p for qemu-devel@nongnu.org; Wed, 28 Oct 2015 10:32:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZrRmY-0002XT-0d for qemu-devel@nongnu.org; Wed, 28 Oct 2015 10:32:55 -0400 Received: from mga01.intel.com ([192.55.52.88]:15622) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZrRmX-00028A-O3 for qemu-devel@nongnu.org; Wed, 28 Oct 2015 10:32:53 -0400 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga101.fm.intel.com with ESMTP; 28 Oct 2015 07:32:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,210,1444719600"; d="scan'208";a="589668504" 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; 28 Oct 2015 07:32:50 -0700 From: Xiao Guangrong To: pbonzini@redhat.com, imammedo@redhat.com Date: Wed, 28 Oct 2015 22:26:26 +0000 Message-Id: <1446071191-62591-29-git-send-email-guangrong.xiao@linux.intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1446071191-62591-1-git-send-email-guangrong.xiao@linux.intel.com> References: <1446071191-62591-1-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: 192.55.52.88 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 v5 28/33] nvdimm acpi: support Get Namespace Label Size 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 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 8efa640..72203d2 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 nvdimm_func_in_get_label_data { + 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 nvdimm_func_in_get_label_data nvdimm_func_in_get_label_data; + +struct nvdimm_func_in_set_label_data { + 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 nvdimm_func_in_set_label_data nvdimm_func_in_set_label_data; + struct nvdimm_dsm_in { 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]; + nvdimm_func_in_set_label_data func_set_label_data; + }; } QEMU_PACKED; typedef struct nvdimm_dsm_in nvdimm_dsm_in; +struct nvdimm_func_out_label_size { + 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 nvdimm_func_out_label_size nvdimm_func_out_label_size; + +struct nvdimm_func_out_get_label_data { + uint32_t status; /*return status code. */ + uint8_t out_buf[0]; /* the data got via Get Namesapce Label function. */ +} QEMU_PACKED; +typedef struct nvdimm_func_out_get_label_data nvdimm_func_out_get_label_data; + 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(nvdimm_dsm_in *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) +{ + nvdimm_dsm_in *in; + uint32_t max_get_size, max_set_size, dsm_memory_size = getpagesize(); + + /* + * 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(nvdimm_func_out_get_label_data); + + /* + * the max data ACPI can write one time which is transferred by + * 'Set Namespace Label Data' function. + */ + max_set_size = dsm_memory_size - offsetof(nvdimm_dsm_in, 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) +{ + nvdimm_func_out_label_size 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(nvdimm_dsm_in *in, GArray *out) { GSList *list = nvdimm_get_plugged_device_list(); @@ -469,6 +551,9 @@ static void nvdimm_dsm_device(nvdimm_dsm_in *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; };