From patchwork Thu Jul 1 20:09:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Verma, Vishal L" X-Patchwork-Id: 12354835 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E615C11F6B for ; Thu, 1 Jul 2021 20:10:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 62B496140D for ; Thu, 1 Jul 2021 20:10:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233916AbhGAUM4 (ORCPT ); Thu, 1 Jul 2021 16:12:56 -0400 Received: from mga03.intel.com ([134.134.136.65]:63970 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233925AbhGAUM4 (ORCPT ); Thu, 1 Jul 2021 16:12:56 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10032"; a="208653261" X-IronPort-AV: E=Sophos;i="5.83,315,1616482800"; d="scan'208";a="208653261" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jul 2021 13:10:23 -0700 X-IronPort-AV: E=Sophos;i="5.83,315,1616482800"; d="scan'208";a="409271395" Received: from anandvig-mobl.amr.corp.intel.com (HELO vverma7-desk.amr.corp.intel.com) ([10.254.38.85]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jul 2021 13:10:22 -0700 From: Vishal Verma To: , Cc: Dan Williams , Ben Widawsky , Alison Schofield , Ira Weiny , Vishal Verma Subject: [ndctl PATCH v3 15/21] libcxl: PLACEHOLDER: add an interface to determine whether a memdev is active Date: Thu, 1 Jul 2021 14:09:59 -0600 Message-Id: <20210701201005.3065299-16-vishal.l.verma@intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210701201005.3065299-1-vishal.l.verma@intel.com> References: <20210701201005.3065299-1-vishal.l.verma@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org Add an interface to determine whether a memdev is bound to a region driver and therefore is currently active. For now, this just returns '0' all the time - i.e. devices are always considered inactive. Flesh this out fully once the region driver is available. Cc: Dan Williams Signed-off-by: Vishal Verma --- cxl/lib/libcxl.c | 10 ++++++++++ cxl/libcxl.h | 1 + cxl/lib/libcxl.sym | 1 + 3 files changed, 12 insertions(+) diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c index ae03e03..246fa2a 100644 --- a/cxl/lib/libcxl.c +++ b/cxl/lib/libcxl.c @@ -361,6 +361,16 @@ CXL_EXPORT size_t cxl_memdev_get_lsa_size(struct cxl_memdev *memdev) return memdev->lsa_size; } +CXL_EXPORT int cxl_memdev_is_active(struct cxl_memdev *memdev) +{ + /* + * TODO: Currently memdevs are always considered inactive. Once we have + * cxl_bus drivers that are bound/unbound to memdevs, we'd use that to + * determine the active/inactive state. + */ + return 0; +} + CXL_EXPORT void cxl_cmd_unref(struct cxl_cmd *cmd) { if (!cmd) diff --git a/cxl/libcxl.h b/cxl/libcxl.h index eeace11..65f6c62 100644 --- a/cxl/libcxl.h +++ b/cxl/libcxl.h @@ -43,6 +43,7 @@ unsigned long long cxl_memdev_get_pmem_size(struct cxl_memdev *memdev); unsigned long long cxl_memdev_get_ram_size(struct cxl_memdev *memdev); const char *cxl_memdev_get_firmware_verison(struct cxl_memdev *memdev); size_t cxl_memdev_get_lsa_size(struct cxl_memdev *memdev); +int cxl_memdev_is_active(struct cxl_memdev *memdev); #define cxl_memdev_foreach(ctx, memdev) \ for (memdev = cxl_memdev_get_first(ctx); \ diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym index a5a1371..d90502f 100644 --- a/cxl/lib/libcxl.sym +++ b/cxl/lib/libcxl.sym @@ -59,4 +59,5 @@ global: LIBCXL_4 { global: cxl_memdev_get_lsa_size; + cxl_memdev_is_active; } LIBCXL_3;