From patchwork Thu Mar 17 08:32:58 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Guangrong X-Patchwork-Id: 598933 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 3qQhYL3K42z9s0M for ; Thu, 17 Mar 2016 19:37:10 +1100 (AEDT) Received: from localhost ([::1]:33345 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1agTQa-0005vy-9v for incoming@patchwork.ozlabs.org; Thu, 17 Mar 2016 04:37:08 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37566) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1agTMv-0006Ta-DL for qemu-devel@nongnu.org; Thu, 17 Mar 2016 04:33:22 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1agTMs-0001ZL-Mj 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 1agTMs-0001Sg-DG for qemu-devel@nongnu.org; Thu, 17 Mar 2016 04:33:18 -0400 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga103.fm.intel.com with ESMTP; 17 Mar 2016 01:33:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,349,1455004800"; d="scan'208";a="671127538" 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 01:33:15 -0700 From: Xiao Guangrong To: pbonzini@redhat.com, imammedo@redhat.com Date: Thu, 17 Mar 2016 16:32:58 +0800 Message-Id: <1458203581-59143-13-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 12/15] 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 | 130 +++++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 126 insertions(+), 4 deletions(-) diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c index 83d80f5..4b5f672 100644 --- a/hw/acpi/nvdimm.c +++ b/hw/acpi/nvdimm.c @@ -216,6 +216,26 @@ static uint32_t nvdimm_slot_to_dcr_index(int slot) return nvdimm_slot_to_spa_index(slot) + 1; } +static NVDIMMDevice *nvdimm_get_device_by_handle(uint32_t handle) +{ + NVDIMMDevice *nvdimm = NULL; + GSList *list, *device_list = nvdimm_get_plugged_device_list(); + + for (list = device_list; list; list = list->next) { + NVDIMMDevice *nvd = list->data; + int slot = object_property_get_int(OBJECT(nvd), PC_DIMM_SLOT_PROP, + NULL); + + if (nvdimm_slot_to_handle(slot) == handle) { + nvdimm = nvd; + break; + } + } + + g_slist_free(device_list); + return nvdimm; +} + /* ACPI 6.0: 5.2.25.1 System Physical Address Range Structure */ static void nvdimm_build_structure_spa(GArray *structures, DeviceState *dev) @@ -404,6 +424,35 @@ struct NvdimmDsmFuncNoPayloadOut { } QEMU_PACKED; typedef struct NvdimmDsmFuncNoPayloadOut NvdimmDsmFuncNoPayloadOut; +struct NvdimmFuncGetLabelSizeOut { + /* the size of buffer filled by QEMU. */ + uint32_t len; + uint32_t func_ret_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 NvdimmFuncGetLabelSizeOut NvdimmFuncGetLabelSizeOut; +QEMU_BUILD_BUG_ON(sizeof(NvdimmFuncGetLabelSizeOut) > TARGET_PAGE_SIZE); + +struct NvdimmFuncGetLabelDataOut { + /* the size of buffer filled by QEMU. */ + uint32_t len; + uint32_t func_ret_status; /* return status code. */ + uint8_t out_buf[0]; /* the data got via Get Namesapce Label function. */ +} QEMU_PACKED; +typedef struct NvdimmFuncGetLabelDataOut NvdimmFuncGetLabelDataOut; + +struct NvdimmFuncSetLabelDataIn { + 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 NvdimmFuncSetLabelDataIn NvdimmFuncSetLabelDataIn; + static void nvdimm_dsm_function0(uint32_t supported_func, hwaddr dsm_mem_addr) { @@ -439,16 +488,89 @@ static void nvdimm_dsm_root(NvdimmDsmIn *in, hwaddr dsm_mem_addr) nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr); } +/* + * 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) +{ + 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(NvdimmFuncGetLabelDataOut); + + /* + * the max data ACPI can write one time which is transferred by + * 'Set Namespace Label Data' function. + */ + max_set_size = dsm_memory_size - sizeof(NvdimmDsmIn) - + sizeof(NvdimmFuncSetLabelDataIn); + + 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_label_size(NVDIMMDevice *nvdimm, hwaddr dsm_mem_addr) +{ + NvdimmFuncGetLabelSizeOut label_size_out = { + .len = cpu_to_le32(sizeof(label_size_out)), + }; + 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); + + label_size_out.func_ret_status = cpu_to_le32(0 /* Success */); + label_size_out.label_size = cpu_to_le32(label_size); + label_size_out.max_xfer = cpu_to_le32(mxfer); + + cpu_physical_memory_write(dsm_mem_addr, &label_size_out, + sizeof(label_size_out)); +} + static void nvdimm_dsm_device(NvdimmDsmIn *in, hwaddr dsm_mem_addr) { + NVDIMMDevice *nvdimm = nvdimm_get_device_by_handle(in->handle); + /* See the comments in nvdimm_dsm_root(). */ if (!in->function) { - return nvdimm_dsm_function0(0 /* No function supported other - than function 0 */, dsm_mem_addr); + uint32_t supported_func = 0; + + if (nvdimm && nvdimm->reserve_label) { + supported_func |= 0x1 /* Bit 0 indicates whether there is + support for any functions other + than function 0. */ | + 1 << 4 /* Get Namespace Label Size */; + } + return nvdimm_dsm_function0(supported_func, dsm_mem_addr); } - /* No function except function 0 is supported yet. */ - nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr); + if (!nvdimm) { + return nvdimm_dsm_no_payload(1 /* Non-Existing Memory Device */, + dsm_mem_addr); + } + + /* Encode DSM function according to DSM Spec Rev1. */ + switch (in->function) { + case 4 /* Get Namespace Label Size */: + if (nvdimm->reserve_label) { + nvdimm_dsm_label_size(nvdimm, dsm_mem_addr); + } + break; + default: + nvdimm_dsm_no_payload(1 /* Not Supported */, dsm_mem_addr); + } } static uint64_t