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Thu, 11 Jan 2024 13:18:02 +0000 From: To: , , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [RFC PATCH v5 02/12] cxl/mbox: Add GET_FEATURE mailbox command Date: Thu, 11 Jan 2024 21:17:31 +0800 Message-ID: <20240111131741.1356-3-shiju.jose@huawei.com> X-Mailer: git-send-email 2.35.1.windows.2 In-Reply-To: <20240111131741.1356-1-shiju.jose@huawei.com> References: <20240111131741.1356-1-shiju.jose@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain 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: 417364001E X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: sppjjpjn4d8k3z5tsa6hp58fawu9dsrk X-HE-Tag: 1704979085-135042 X-HE-Meta: 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 XPJBCYpi izIXdch/PzvHl17LBJOvgdNcXqm3PSdqXr01Jc+f2ZhKF6A3zAxlWESvLobOIOgSzd+/7SW0VLFTdN9OjS1ajZ9jDWQqs4IuryvzjG3fF98aYTTMrKkDvqIDy6rApQ5LUu6QFK9Dv7odMRZ3o0ZZ9gWErCadB70+6sRFT27QWbqjibCKDIJtYIggDpXLzlPB5NFDDqmBX41FPtz1x6iSTGogZB7GCx/kbJOIZvRXGHIJlxSc= 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); -- 2.34.1