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: 13766598 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7921EC531DF for ; Fri, 16 Aug 2024 16:43:45 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 616276B011A; Fri, 16 Aug 2024 12:43:40 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4FE106B0120; Fri, 16 Aug 2024 12:43:40 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 32B588D007E; Fri, 16 Aug 2024 12:43:40 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 0CA656B011A for ; Fri, 16 Aug 2024 12:43:40 -0400 (EDT) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id C11F6C012C for ; Fri, 16 Aug 2024 16:43:39 +0000 (UTC) X-FDA: 82458679758.10.EE4D0FE Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by imf23.hostedemail.com (Postfix) with ESMTP id C2F53140008 for ; Fri, 16 Aug 2024 16:43:37 +0000 (UTC) Authentication-Results: imf23.hostedemail.com; dkim=none; spf=pass (imf23.hostedemail.com: domain of shiju.jose@huawei.com designates 185.176.79.56 as permitted sender) smtp.mailfrom=shiju.jose@huawei.com; dmarc=pass (policy=quarantine) header.from=huawei.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1723826604; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=fzdWhbc3IUml8oUVho/VdgdE1Q4izvcl7uFhyDf6MjE=; b=cBnrcMDKFUOQ6ZFsH5E80o0C2Q+mCcNjf5CGDG7DhW0apVKGKG898acI6issuASV3vlxdI r8G+VvdDZk8wbVby1YCiwGYqKB/ArJtujMOajUW1TcrAWc4Mmj7Lk2Tw6RTNb3knujOKAB n61oSFW04Rrb3f0W6EOv0nol3chX47w= ARC-Authentication-Results: i=1; imf23.hostedemail.com; dkim=none; spf=pass (imf23.hostedemail.com: domain of shiju.jose@huawei.com designates 185.176.79.56 as permitted sender) smtp.mailfrom=shiju.jose@huawei.com; dmarc=pass (policy=quarantine) header.from=huawei.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1723826604; a=rsa-sha256; cv=none; b=cVuAq2gEcm1LXXAE7aDzgSE2DQDWsjzV99Mnqd8wADy8YSveSdYLUkBbnHfyJvJ9XAt7ZM Txk6W+ufugBgJu3U5qHQAi+3vqQCVLFC1l9cGb8JjS7Q11cL+P0hQv6izUmo1mROjfSeEr 7oEQWwfj1Qem0CRDdfir8eUvcyzxq2M= 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> MIME-Version: 1.0 X-Originating-IP: [10.48.148.43] X-ClientProxiedBy: lhrpeml100005.china.huawei.com (7.191.160.25) To lhrpeml500006.china.huawei.com (7.191.161.198) X-Rspam-User: X-Stat-Signature: 5umpgnok4ha4fkjhbdwet4pr8ew93wxo X-Rspamd-Queue-Id: C2F53140008 X-Rspamd-Server: rspam11 X-HE-Tag: 1723826617-456663 X-HE-Meta: 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 5R/ZGrBP vIglkWmasL8xsgk2ZrRIF3YzUs5fX6rI2Ojc7m/a7BNG3xeJgmyFSaVCbMvYj9IACrGsfYBBEmDLXz8zTGsdI6PdKUX4e2Yl5P9CzxR2vXwtMsio/1IFeY61qojZX/dxI3mtM5M1co3m3P0qQiTtfEXYB8SHxDNJy85q+ZIVCGQ9K5WuKSeWF5yG2UMWc6knHnRWnXWljXOnDc5kqmOeBr60fnGK33cMmAc7fgijn44n++sRBWvftiFAqDS2I2gdOqzTRpgb8f9PZbZU= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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);