From patchwork Mon Oct 19 00:54:15 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Guangrong X-Patchwork-Id: 531986 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 05E661402D1 for ; Mon, 19 Oct 2015 04:17:28 +1100 (AEDT) Received: from localhost ([::1]:34837 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZnraH-0001cN-PP for incoming@patchwork.ozlabs.org; Sun, 18 Oct 2015 13:17:25 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42973) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZnrK4-0008Ng-Ba for qemu-devel@nongnu.org; Sun, 18 Oct 2015 13:00:41 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZnrK3-0000QE-8L for qemu-devel@nongnu.org; Sun, 18 Oct 2015 13:00:40 -0400 Received: from mga09.intel.com ([134.134.136.24]:58036) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZnrK2-0000CK-UE for qemu-devel@nongnu.org; Sun, 18 Oct 2015 13:00:39 -0400 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga102.jf.intel.com with ESMTP; 18 Oct 2015 10:00:36 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,698,1437462000"; d="scan'208";a="583276007" 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; 18 Oct 2015 10:00:34 -0700 From: Xiao Guangrong To: pbonzini@redhat.com, imammedo@redhat.com Date: Mon, 19 Oct 2015 08:54:15 +0800 Message-Id: <1445216059-88521-30-git-send-email-guangrong.xiao@linux.intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1445216059-88521-1-git-send-email-guangrong.xiao@linux.intel.com> References: <1445216059-88521-1-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: 134.134.136.24 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 v4 29/33] nvdimm acpi: support DSM_DEV_FUN_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 | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 95 insertions(+), 2 deletions(-) diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index 37fea1c..1274d95 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -481,12 +481,28 @@ enum { | (1 << DSM_DEV_FUN_GET_NAMESPACE_LABEL_DATA) \ | (1 << DSM_DEV_FUN_SET_NAMESPACE_LABEL_DATA)) +struct cmd_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 cmd_in_get_label_data cmd_in_get_label_data; + +struct cmd_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 cmd_in_set_label_data cmd_in_set_label_data; + struct 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]; + cmd_in_set_label_data cmd_set_label_data; + }; } QEMU_PACKED; typedef struct dsm_in dsm_in; @@ -495,10 +511,32 @@ struct cmd_out_implemented { }; typedef struct cmd_out_implemented cmd_out_implemented; +struct cmd_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 cmd_out_label_size cmd_out_label_size; + +struct cmd_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 cmd_out_get_label_data cmd_out_get_label_data; + struct dsm_out { /* the size of buffer filled by QEMU. */ uint32_t len; - uint8_t data[0]; + union { + uint8_t data[0]; + cmd_out_implemented cmd_implemented; + cmd_out_label_size cmd_label_size; + cmd_out_get_label_data cmd_get_label_data; + }; } QEMU_PACKED; typedef struct dsm_out dsm_out; @@ -534,6 +572,58 @@ static void nvdimm_dsm_write_root(dsm_in *in, GArray *out) nvdimm_dsm_write_status(out, status); } +/* + * the max transfer size is the max size transferred by both a + * DSM_DEV_FUN_GET_NAMESPACE_LABEL_DATA and a + * DSM_DEV_FUN_SET_NAMESPACE_LABEL_DATA command. + */ +static uint32_t nvdimm_get_max_xfer_label_size(void) +{ + dsm_in *in; + dsm_out *out; + 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 DSM_DEV_FUN_GET_NAMESPACE_LABEL_DATA. + */ + max_get_size = dsm_memory_size - offsetof(dsm_out, data) - + sizeof(out->cmd_get_label_data); + + /* + * the max data ACPI can write one time which is transferred by + * DSM_DEV_FUN_SET_NAMESPACE_LABEL_DATA + */ + max_set_size = dsm_memory_size - offsetof(dsm_in, arg3) - + sizeof(in->cmd_set_label_data); + + return MIN(max_get_size, max_set_size); +} + +/* + * Please refer to DSM specification 4.4.1 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) +{ + cmd_out_label_size cmd_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); + + cmd_label_size.status = cpu_to_le32(DSM_STATUS_SUCCESS); + cmd_label_size.label_size = cpu_to_le32(label_size); + cmd_label_size.max_xfer = cpu_to_le32(mxfer); + + g_array_append_vals(out, &cmd_label_size, sizeof(cmd_label_size)); +} + static void nvdimm_dsm_write_nvdimm(dsm_in *in, GArray *out) { GSList *list = nvdimm_get_plugged_device_list(); @@ -551,6 +641,9 @@ static void nvdimm_dsm_write_nvdimm(dsm_in *in, GArray *out) cmd_list = cpu_to_le64(DIMM_SUPPORT_FUN); g_array_append_vals(out, &cmd_list, sizeof(cmd_list)); goto free; + case DSM_DEV_FUN_NAMESPACE_LABEL_SIZE: + nvdimm_dsm_func_label_size(nvdimm, out); + goto free; default: status = DSM_STATUS_NOT_SUPPORTED; };