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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 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) X-Rspamd-Queue-Id: CF7D21C001A X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: a993xtkg13p7gj9chfq4uhe69bhy5s4x X-HE-Tag: 1701372210-870874 X-HE-Meta: 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 rZy+rVXA dFOAfByPQQNsLEpnoKFiH1DoBDuvRJ85HFVDecwowftx/lNNtZX4aEWoqJmNfTlUyTR2p6PWU6sf9VaFHED6+TE/QJetzxGj4h+MF4nGoz2TYXBKdhsAf5NO8RuRAKaBCuVSs6wl3HM3nsxDGVKYYERaEf4g9gCvpBHeAX6Lr0CocMQP9p4Gx/c01xU9YgeC2LQLk8YztXJ7qvFJnQSzon9we60pT3dhCAaWm9RaUAjtfomg= 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 3.0 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_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 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 = 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, @@ -796,6 +797,26 @@ struct cxl_mbox_get_supp_feats_out { struct cxl_mbox_supp_feat_entry feat_entries[]; } __packed; +/* 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 = 0x0, + CXL_GET_FEAT_SEL_DEFAULT_VALUE = 0x1, + CXL_GET_FEAT_SEL_SAVED_VALUE = 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);