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Fri, 7 Feb 2025 22:45:43 +0800 (CST) Received: from P_UKIT01-A7bmah.china.huawei.com (10.126.173.5) by frapeml500007.china.huawei.com (7.182.85.172) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Fri, 7 Feb 2025 15:45:41 +0100 From: To: , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v19 07/15] cxl: Add helper function to retrieve a feature entry Date: Fri, 7 Feb 2025 14:44:36 +0000 Message-ID: <20250207144445.1879-8-shiju.jose@huawei.com> X-Mailer: git-send-email 2.43.0.windows.1 In-Reply-To: <20250207144445.1879-1-shiju.jose@huawei.com> References: <20250207144445.1879-1-shiju.jose@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.126.173.5] X-ClientProxiedBy: lhrpeml500001.china.huawei.com (7.191.163.213) To frapeml500007.china.huawei.com (7.182.85.172) X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: B79A120019 X-Stat-Signature: wy1wm7bapa9gaoaqrshjjghn5hf1rtpe X-HE-Tag: 1738939545-767738 X-HE-Meta: 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 6DbNCm/v yPM0Xd9Xy3PIJ8Arx7zKtJUlQYGyyJ/2gNuSVjiXgqKTE07/SHvD6de1qEV4he6fhKWEkGXlz6z+iUuW3NSJi+x2tqm+ZG5V6cPw8iWI5vltfyK6bi4/KH++daiAZMjHX2YSKyvKusnVL+pA3rcI3VfVq141EWZWHZ2au2/1NmWnN4m5XKOAY4fKXzhuDjK1dj7Oj6uxY1R9dAgV9ARQpi5Hf8Q== 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 helper function to retrieve a feature entry from the supported features list, if supported. Signed-off-by: Shiju Jose --- drivers/cxl/core/features.c | 21 +++++++++++++++++++++ include/cxl/features.h | 2 ++ 2 files changed, 23 insertions(+) diff --git a/drivers/cxl/core/features.c b/drivers/cxl/core/features.c index 5f64185a5c7a..bf175e69cda1 100644 --- a/drivers/cxl/core/features.c +++ b/drivers/cxl/core/features.c @@ -43,6 +43,27 @@ bool is_cxl_feature_exclusive(struct cxl_feat_entry *entry) } EXPORT_SYMBOL_NS_GPL(is_cxl_feature_exclusive, "CXL"); +struct cxl_feat_entry *cxl_get_feature_entry(struct cxl_memdev *cxlmd, + const uuid_t *feat_uuid) +{ + struct cxl_features_state *cxlfs = cxlmd->cxlfs; + struct cxl_feat_entry *feat_entry; + int count; + + /* + * Retrieve the feature entry from the supported features list, + * if the feature is supported. + */ + feat_entry = cxlfs->entries; + for (count = 0; count < cxlfs->num_features; count++, feat_entry++) { + if (uuid_equal(&feat_entry->uuid, feat_uuid)) + return feat_entry; + } + + return ERR_PTR(-ENOENT); +} +EXPORT_SYMBOL_NS_GPL(cxl_get_feature_entry, "CXL"); + size_t cxl_get_feature(struct cxl_mailbox *cxl_mbox, const uuid_t *feat_uuid, enum cxl_get_feat_selection selection, void *feat_out, size_t feat_out_size, u16 offset, diff --git a/include/cxl/features.h b/include/cxl/features.h index e52d0573f504..563d966beee5 100644 --- a/include/cxl/features.h +++ b/include/cxl/features.h @@ -68,6 +68,8 @@ struct cxl_features_state { }; struct cxl_mailbox; +struct cxl_feat_entry *cxl_get_feature_entry(struct cxl_memdev *cxlmd, + const uuid_t *feat_uuid); size_t cxl_get_feature(struct cxl_mailbox *cxl_mbox, const uuid_t *feat_uuid, enum cxl_get_feat_selection selection, void *feat_out, size_t feat_out_size, u16 offset,