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Thu, 23 Nov 2023 17:44:04 +0000 From: To: , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v3 02/11] cxl/mbox: Add GET_FEATURE mailbox command Date: Fri, 24 Nov 2023 01:43:45 +0800 Message-ID: <20231123174355.1176-3-shiju.jose@huawei.com> X-Mailer: git-send-email 2.35.1.windows.2 In-Reply-To: <20231123174355.1176-1-shiju.jose@huawei.com> References: <20231123174355.1176-1-shiju.jose@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.122.247.234] X-ClientProxiedBy: lhrpeml100003.china.huawei.com (7.191.160.210) To lhrpeml500006.china.huawei.com (7.191.161.198) X-CFilter-Loop: Reflected X-Rspamd-Queue-Id: 1898B10001D X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: fzm4gfoj7xnsciqm8wcjaiguur4m5cyu X-HE-Tag: 1700761448-236782 X-HE-Meta: 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 0OZjgTOA aRSV6QJID0z0/IdF9YO+Hdtc4almUQRQS2TbWV9eaXmkhH69QLJArK/7kluf71/at0CCDUJ26RZwRRxsSqjFirC441sXyMiCxZ6kxYdMETwy/vjq4mjVHV9DJAlK6a6aC/q0JbKAKUPc6FgA49UrJ4+b7u+9Ga3uHFzbd8Fu193xfC0WtzVOIr/0R4lBMHxkqUBpJHt4G9jPy0AKzsAtRCxAXV2fExMHQGJkpW9TBEDKD2yc= 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 eb2741446b5f..759b7e7e6a09 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 = (size_t)pi->count, + .payload_out = feat_out, + .min_out = (size_t)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);