From patchwork Thu Oct 7 08:21:28 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: 12541279 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1E929C433FE for ; Thu, 7 Oct 2021 08:22:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 02A566138B for ; Thu, 7 Oct 2021 08:22:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240700AbhJGIX5 (ORCPT ); Thu, 7 Oct 2021 04:23:57 -0400 Received: from mga14.intel.com ([192.55.52.115]:1544 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240522AbhJGIX4 (ORCPT ); Thu, 7 Oct 2021 04:23:56 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10129"; a="226507646" X-IronPort-AV: E=Sophos;i="5.85,354,1624345200"; d="scan'208";a="226507646" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Oct 2021 01:21:55 -0700 X-IronPort-AV: E=Sophos;i="5.85,354,1624345200"; d="scan'208";a="568555098" Received: from abishekh-mobl.amr.corp.intel.com (HELO vverma7-desk.amr.corp.intel.com) ([10.251.133.239]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Oct 2021 01:21:55 -0700 From: Vishal Verma To: Cc: Dan Williams , Ben Widawsky , , Vishal Verma Subject: [ndctl PATCH v4 06/17] libcxl: add support for the 'Identify Device' command Date: Thu, 7 Oct 2021 02:21:28 -0600 Message-Id: <20211007082139.3088615-7-vishal.l.verma@intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211007082139.3088615-1-vishal.l.verma@intel.com> References: <20211007082139.3088615-1-vishal.l.verma@intel.com> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=4490; h=from:subject; bh=CKBDjAWZiWN3N0tdA+H/65v+nloeW1zhaldbio5Dqnw=; b=owGbwMvMwCHGf25diOft7jLG02pJDIlx61hnddz4ebTzCz/LgfiL7IGGBfsWRj9YbH3A9t3rxgu1 OzLaOkpZGMQ4GGTFFFn+7vnIeExuez5PYIIjzBxWJpAhDFycAjARSXZGhtUKxwITJQqtuA3f593+p3 ButsJ13wVtblq3NzO9ZF4o8Yzhr/Cdw7dWPssKmt0nvfyCYpfCX1mWL+UV36+dZE5rfZ72khsA X-Developer-Key: i=vishal.l.verma@intel.com; a=openpgp; fpr=F8682BE134C67A12332A2ED07AFA61BEA3B84DFF Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org Add APIs to allocate and send an 'Identify Device' command, and accessors to retrieve some of the fields from the resulting data. Only add a handful accessor functions; more can be added as the need arises. The fields added are fw_revision, partition_align, and lsa_size. Cc: Ben Widawsky Cc: Dan Williams Reviewed-by: Dan Williams Signed-off-by: Vishal Verma --- cxl/lib/private.h | 19 ++++++++++++++++++ cxl/lib/libcxl.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++ cxl/libcxl.h | 4 ++++ cxl/lib/libcxl.sym | 4 ++++ 4 files changed, 76 insertions(+) diff --git a/cxl/lib/private.h b/cxl/lib/private.h index 87ca17e..3273f21 100644 --- a/cxl/lib/private.h +++ b/cxl/lib/private.h @@ -54,6 +54,25 @@ struct cxl_cmd { int status; }; +#define CXL_CMD_IDENTIFY_FW_REV_LENGTH 0x10 + +struct cxl_cmd_identify { + char fw_revision[CXL_CMD_IDENTIFY_FW_REV_LENGTH]; + le64 total_capacity; + le64 volatile_capacity; + le64 persistent_capacity; + le64 partition_align; + le16 info_event_log_size; + le16 warning_event_log_size; + le16 failure_event_log_size; + le16 fatal_event_log_size; + le32 lsa_size; + u8 poison_list_max_mer[3]; + le16 inject_poison_limit; + u8 poison_caps; + u8 qos_telemetry_caps; +} __attribute__((packed)); + static inline int check_kmod(struct kmod_ctx *kmod_ctx) { return kmod_ctx ? 0 : -ENXIO; diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c index ae13795..38fdd89 100644 --- a/cxl/lib/libcxl.c +++ b/cxl/lib/libcxl.c @@ -13,7 +13,10 @@ #include #include #include +#include +#include #include +#include #include #include @@ -674,6 +677,52 @@ CXL_EXPORT const char *cxl_cmd_get_devname(struct cxl_cmd *cmd) return cxl_memdev_get_devname(cmd->memdev); } +CXL_EXPORT struct cxl_cmd *cxl_cmd_new_identify(struct cxl_memdev *memdev) +{ + return cxl_cmd_new_generic(memdev, CXL_MEM_COMMAND_ID_IDENTIFY); +} + +CXL_EXPORT int cxl_cmd_identify_get_fw_rev(struct cxl_cmd *cmd, char *fw_rev, + int fw_len) +{ + struct cxl_cmd_identify *id = (void *)cmd->send_cmd->out.payload; + + if (cmd->send_cmd->id != CXL_MEM_COMMAND_ID_IDENTIFY) + return -EINVAL; + if (cmd->status < 0) + return cmd->status; + + if (fw_len > 0) + memcpy(fw_rev, id->fw_revision, + min(fw_len, CXL_CMD_IDENTIFY_FW_REV_LENGTH)); + return 0; +} + +CXL_EXPORT unsigned long long cxl_cmd_identify_get_partition_align( + struct cxl_cmd *cmd) +{ + struct cxl_cmd_identify *id = (void *)cmd->send_cmd->out.payload; + + if (cmd->send_cmd->id != CXL_MEM_COMMAND_ID_IDENTIFY) + return -EINVAL; + if (cmd->status < 0) + return cmd->status; + + return le64_to_cpu(id->partition_align); +} + +CXL_EXPORT unsigned int cxl_cmd_identify_get_label_size(struct cxl_cmd *cmd) +{ + struct cxl_cmd_identify *id = (void *)cmd->send_cmd->out.payload; + + if (cmd->send_cmd->id != CXL_MEM_COMMAND_ID_IDENTIFY) + return -EINVAL; + if (cmd->status < 0) + return cmd->status; + + return le32_to_cpu(id->lsa_size); +} + CXL_EXPORT struct cxl_cmd *cxl_cmd_new_raw(struct cxl_memdev *memdev, int opcode) { diff --git a/cxl/libcxl.h b/cxl/libcxl.h index 6e87b80..0f2d5e9 100644 --- a/cxl/libcxl.h +++ b/cxl/libcxl.h @@ -58,6 +58,10 @@ void cxl_cmd_unref(struct cxl_cmd *cmd); int cxl_cmd_submit(struct cxl_cmd *cmd); int cxl_cmd_get_mbox_status(struct cxl_cmd *cmd); int cxl_cmd_get_out_size(struct cxl_cmd *cmd); +struct cxl_cmd *cxl_cmd_new_identify(struct cxl_memdev *memdev); +int cxl_cmd_identify_get_fw_rev(struct cxl_cmd *cmd, char *fw_rev, int fw_len); +unsigned long long cxl_cmd_identify_get_partition_align(struct cxl_cmd *cmd); +unsigned int cxl_cmd_identify_get_label_size(struct cxl_cmd *cmd); #ifdef __cplusplus } /* extern "C" */ diff --git a/cxl/lib/libcxl.sym b/cxl/lib/libcxl.sym index 493429c..c083304 100644 --- a/cxl/lib/libcxl.sym +++ b/cxl/lib/libcxl.sym @@ -39,4 +39,8 @@ global: cxl_cmd_submit; cxl_cmd_get_mbox_status; cxl_cmd_get_out_size; + cxl_cmd_new_identify; + cxl_cmd_identify_get_fw_rev; + cxl_cmd_identify_get_partition_align; + cxl_cmd_identify_get_label_size; } LIBCXL_2;