From patchwork Fri Aug 16 16:42:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiju Jose X-Patchwork-Id: 819758 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F25151C0DEE; Fri, 16 Aug 2024 16:43:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.176.79.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723826620; cv=none; b=CIv2xCu9CKnvgCvk1SO7lUgjF/RfBVz2/UngH+13JG3g9KLo0Mh/EmtxerRRIY583HpabsV+ofYg+F+LwHSSlp9/j369qT77FzgeHuvhngr7jE4ZSQj4DU5jUe08+J1W4L4piziW2P5AZjRImDy9e//VMySzlT01fZZEWBlRZFw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723826620; c=relaxed/simple; bh=jN1gN/vlqkDO0davdYpA+VVl1ecXGdLvU+odC3ZOUdo=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=JJi4DT+omniQ7fLZgP1xyD5BGHTxKIZ8Vo0YCIrtqMU3asql6TRf6GACpomfbb0o6z6A5ki/9pi3P8f3EmMh6ZI912VXWxqKBpDopw98du+coW4JFneJF78Je8HZcHOci/WRQN3UYt7EIWEDhK4icedaatOMesBr3GP068WEOVU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=185.176.79.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.186.216]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4Wlnlw6Wphz6K5q1; Sat, 17 Aug 2024 00:40:12 +0800 (CST) Received: from lhrpeml500006.china.huawei.com (unknown [7.191.161.198]) by mail.maildlp.com (Postfix) with ESMTPS id DF9D2140A36; Sat, 17 Aug 2024 00:43:35 +0800 (CST) Received: from P_UKIT01-A7bmah.china.huawei.com (10.48.148.43) by lhrpeml500006.china.huawei.com (7.191.161.198) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Fri, 16 Aug 2024 17:43:34 +0100 From: To: , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v11 05/14] cxl/mbox: Add GET_FEATURE mailbox command Date: Fri, 16 Aug 2024 17:42:28 +0100 Message-ID: <20240816164238.1902-6-shiju.jose@huawei.com> X-Mailer: git-send-email 2.43.0.windows.1 In-Reply-To: <20240816164238.1902-1-shiju.jose@huawei.com> References: <20240816164238.1902-1-shiju.jose@huawei.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: lhrpeml100005.china.huawei.com (7.191.160.25) To lhrpeml500006.china.huawei.com (7.191.161.198) From: Shiju Jose Add support for GET_FEATURE mailbox command. CXL spec 3.1 section 8.2.9.6 describes optional device specific features. The settings of a feature can be retrieved using Get Feature command. CXL spec 3.1 section 8.2.9.6.2 describes Get Feature command. Signed-off-by: Shiju Jose --- drivers/cxl/core/mbox.c | 40 ++++++++++++++++++++++++++++++++++++++++ drivers/cxl/cxlmem.h | 27 +++++++++++++++++++++++++++ 2 files changed, 67 insertions(+) diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index 760fa3e1075f..c283684e8e73 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -1392,6 +1392,46 @@ int cxl_get_supported_feature_entry(struct cxl_memdev_state *mds, const uuid_t * } EXPORT_SYMBOL_NS_GPL(cxl_get_supported_feature_entry, CXL); +size_t cxl_get_feature(struct cxl_memdev_state *mds, + const uuid_t feat_uuid, + enum cxl_get_feat_selection selection, + void *feat_out, size_t feat_out_size) +{ + size_t data_to_rd_size, size_out; + struct cxl_mbox_get_feat_in pi; + struct cxl_mbox_cmd mbox_cmd; + size_t data_rcvd_size = 0; + int rc; + + if (!feat_out || !feat_out_size) + return 0; + + size_out = min(feat_out_size, mds->payload_size); + pi.uuid = feat_uuid; + pi.selection = selection; + do { + data_to_rd_size = min(feat_out_size - data_rcvd_size, mds->payload_size); + pi.offset = cpu_to_le16(data_rcvd_size); + pi.count = cpu_to_le16(data_to_rd_size); + + mbox_cmd = (struct cxl_mbox_cmd) { + .opcode = CXL_MBOX_OP_GET_FEATURE, + .size_in = sizeof(pi), + .payload_in = &pi, + .size_out = size_out, + .payload_out = feat_out + data_rcvd_size, + .min_out = data_to_rd_size, + }; + rc = cxl_internal_send_cmd(mds, &mbox_cmd); + if (rc < 0 || !mbox_cmd.size_out) + return 0; + data_rcvd_size += mbox_cmd.size_out; + } while (data_rcvd_size < feat_out_size); + + return data_rcvd_size; +} +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 9939c771f642..608e3ed845a7 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -532,6 +532,7 @@ enum cxl_opcode { CXL_MBOX_OP_CLEAR_LOG = 0x0403, CXL_MBOX_OP_GET_SUP_LOG_SUBLIST = 0x0405, CXL_MBOX_OP_GET_SUPPORTED_FEATURES = 0x0500, + CXL_MBOX_OP_GET_FEATURE = 0x0501, CXL_MBOX_OP_IDENTIFY = 0x4000, CXL_MBOX_OP_GET_PARTITION_INFO = 0x4100, CXL_MBOX_OP_SET_PARTITION_INFO = 0x4101, @@ -758,6 +759,28 @@ struct cxl_mbox_get_supp_feats_out { struct cxl_mbox_supp_feat_entry feat_entries[]; } __packed; +/* + * Get Feature CXL 3.1 Spec 8.2.9.6.2 + */ + +/* + * Get Feature input payload + * CXL rev 3.1 section 8.2.9.6.2 Table 8-99 + */ +enum cxl_get_feat_selection { + CXL_GET_FEAT_SEL_CURRENT_VALUE, + CXL_GET_FEAT_SEL_DEFAULT_VALUE, + CXL_GET_FEAT_SEL_SAVED_VALUE, + 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; @@ -894,6 +917,10 @@ int cxl_get_supported_features(struct cxl_memdev_state *mds, struct cxl_mbox_get_supp_feats_out *feats_out); int cxl_get_supported_feature_entry(struct cxl_memdev_state *mds, const uuid_t *feat_uuid, struct cxl_mbox_supp_feat_entry *feat_entry_out); +size_t cxl_get_feature(struct cxl_memdev_state *mds, + const uuid_t feat_uuid, + enum cxl_get_feat_selection selection, + void *feat_out, size_t feat_out_size); 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);