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Thu, 15 Feb 2024 19:15:06 +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, 15 Feb 2024 11:15:05 +0000 From: To: , , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [RFC PATCH v6 02/12] cxl/mbox: Add GET_FEATURE mailbox command Date: Thu, 15 Feb 2024 19:14:44 +0800 Message-ID: <20240215111455.1462-3-shiju.jose@huawei.com> X-Mailer: git-send-email 2.35.1.windows.2 In-Reply-To: <20240215111455.1462-1-shiju.jose@huawei.com> References: <20240215111455.1462-1-shiju.jose@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.122.247.234] X-ClientProxiedBy: lhrpeml100001.china.huawei.com (7.191.160.183) To lhrpeml500006.china.huawei.com (7.191.161.198) X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: B919414000C X-Stat-Signature: j9tcre1oznwgcm3aatjh3j73uiz8pnwz X-Rspam-User: X-HE-Tag: 1707995709-79040 X-HE-Meta: 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 t6PjglUj dvtdmMtcgIwpJ1Ui8jqELkierZm+v7RoOpuDxQWPSbSwtvHMipK0tC1Rbis0DbOys9zD/M0v8sxJmLQMSnv/2PsCAUnJGBvqE0nHnB+iZ+FgkPGDAY8Wauf2eRGRabvNRRro2ZDTPpCR+JQ+o86m61GnhyEdL11shtrInNdw0Mu3W+b5QzL+GH4HE6rHAC6KNDxnU 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. 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 191f51f3df0e..f43189b6859a 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -1313,6 +1313,28 @@ int cxl_get_supported_features(struct cxl_memdev_state *mds, } EXPORT_SYMBOL_NS_GPL(cxl_get_supported_features, CXL); +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 = (struct cxl_mbox_cmd) { + .opcode = CXL_MBOX_OP_GET_FEATURE, + .size_in = sizeof(*pi), + .payload_in = pi, + .size_out = le16_to_cpu(pi->count), + .payload_out = feat_out, + .min_out = le16_to_cpu(pi->count), + }; + rc = 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 23e4d98b9bae..eaecc3234cfd 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -530,6 +530,7 @@ enum cxl_opcode { CXL_MBOX_OP_GET_SUPPORTED_LOGS = 0x0400, CXL_MBOX_OP_GET_LOG = 0x0401, 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, @@ -757,6 +758,26 @@ 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 + */ +/* Get Feature : Payload in selection */ +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; @@ -891,6 +912,8 @@ 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);