From nobody Wed Dec 17 02:40:53 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CF946C4167B for ; Thu, 30 Nov 2023 19:23:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376397AbjK3TXa (ORCPT ); Thu, 30 Nov 2023 14:23:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47706 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376358AbjK3TXX (ORCPT ); Thu, 30 Nov 2023 14:23:23 -0500 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C3DCD4A; Thu, 30 Nov 2023 11:23:29 -0800 (PST) Received: from mail.maildlp.com (unknown [172.18.186.31]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4Sh5fQ68mpz6D9DZ; Fri, 1 Dec 2023 03:21:50 +0800 (CST) Received: from lhrpeml500006.china.huawei.com (unknown [7.191.161.198]) by mail.maildlp.com (Postfix) with ESMTPS id A30E31402CD; Fri, 1 Dec 2023 03:23:27 +0800 (CST) Received: from SecurePC30232.china.huawei.com (10.122.247.234) by lhrpeml500006.china.huawei.com (7.191.161.198) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Thu, 30 Nov 2023 19:23:26 +0000 From: To: , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v4 02/11] cxl/mbox: Add GET_FEATURE mailbox command Date: Fri, 1 Dec 2023 03:23:04 +0800 Message-ID: <20231130192314.1220-3-shiju.jose@huawei.com> X-Mailer: git-send-email 2.35.1.windows.2 In-Reply-To: <20231130192314.1220-1-shiju.jose@huawei.com> References: <20231130192314.1220-1-shiju.jose@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.122.247.234] X-ClientProxiedBy: lhrpeml500004.china.huawei.com (7.191.163.9) To lhrpeml500006.china.huawei.com (7.191.161.198) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Shiju Jose Add support for GET_FEATURE mailbox command. CXL spec 3.0 section 8.2.9.6 describes optional device specific features. The settings of a feature can be retrieved using Get Feature command. Signed-off-by: Shiju Jose --- drivers/cxl/core/mbox.c | 22 ++++++++++++++++++++++ drivers/cxl/cxlmem.h | 23 +++++++++++++++++++++++ 2 files changed, 45 insertions(+) diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index 6960ce935e73..a50c874edebc 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -1326,6 +1326,28 @@ int cxl_get_supported_features(struct cxl_memdev_sta= te *mds, } EXPORT_SYMBOL_NS_GPL(cxl_get_supported_features, CXL); =20 +int cxl_get_feature(struct cxl_memdev_state *mds, + struct cxl_mbox_get_feat_in *pi, void *feat_out) +{ + struct cxl_mbox_cmd mbox_cmd; + int rc; + + mbox_cmd =3D (struct cxl_mbox_cmd) { + .opcode =3D CXL_MBOX_OP_GET_FEATURE, + .size_in =3D sizeof(*pi), + .payload_in =3D pi, + .size_out =3D le16_to_cpu(pi->count), + .payload_out =3D feat_out, + .min_out =3D le16_to_cpu(pi->count), + }; + rc =3D cxl_internal_send_cmd(mds, &mbox_cmd); + if (rc < 0) + return rc; + + return 0; +} +EXPORT_SYMBOL_NS_GPL(cxl_get_feature, CXL); + int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len, struct cxl_region *cxlr) { diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index d831dad748f5..92c1f2a44713 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -507,6 +507,7 @@ enum cxl_opcode { CXL_MBOX_OP_GET_SUPPORTED_LOGS =3D 0x0400, CXL_MBOX_OP_GET_LOG =3D 0x0401, CXL_MBOX_OP_GET_SUPPORTED_FEATURES =3D 0x0500, + CXL_MBOX_OP_GET_FEATURE =3D 0x0501, CXL_MBOX_OP_IDENTIFY =3D 0x4000, CXL_MBOX_OP_GET_PARTITION_INFO =3D 0x4100, CXL_MBOX_OP_SET_PARTITION_INFO =3D 0x4101, @@ -796,6 +797,26 @@ struct cxl_mbox_get_supp_feats_out { struct cxl_mbox_supp_feat_entry feat_entries[]; } __packed; =20 +/* Get Feature CXL 3.0 Spec 8.2.9.6.2 */ +/* + * Get Feature input payload + * CXL rev 3.0 section 8.2.9.6.2; Table 8-79 + */ +/* Get Feature : Payload in selection */ +enum cxl_get_feat_selection { + CXL_GET_FEAT_SEL_CURRENT_VALUE =3D 0x0, + CXL_GET_FEAT_SEL_DEFAULT_VALUE =3D 0x1, + CXL_GET_FEAT_SEL_SAVED_VALUE =3D 0x2, + CXL_GET_FEAT_SEL_MAX +}; + +struct cxl_mbox_get_feat_in { + uuid_t uuid; + __le16 offset; + __le16 count; + u8 selection; +} __packed; + /* Get Poison List CXL 3.0 Spec 8.2.9.8.4.1 */ struct cxl_mbox_poison_in { __le64 offset; @@ -926,6 +947,8 @@ int cxl_set_timestamp(struct cxl_memdev_state *mds); int cxl_get_supported_features(struct cxl_memdev_state *mds, struct cxl_mbox_get_supp_feats_in *pi, void *feats_out); +int cxl_get_feature(struct cxl_memdev_state *mds, + struct cxl_mbox_get_feat_in *pi, void *feat_out); int cxl_poison_state_init(struct cxl_memdev_state *mds); int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len, struct cxl_region *cxlr); --=20 2.34.1