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Fri, 7 Feb 2025 22:45:55 +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 15:45:53 +0100 From: To: , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v19 11/15] cxl/region: Add helper function to determine memory is online Date: Fri, 7 Feb 2025 14:44:40 +0000 Message-ID: <20250207144445.1879-12-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: rspam08 X-Rspamd-Queue-Id: A43F81C001E X-Stat-Signature: wj6qaep7c7sa4hwdkdp95e3b6mpw9kqp X-HE-Tag: 1738939557-439358 X-HE-Meta: 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 mZj6p5Ac HyUNlXX3dlHRvolwNQSIuKrMovZDS5DPmFczosoPyY3ZS9SvvzinC3/McJwe7EGiI0htp3zlapauf08VgKqz0Tgp4QaxM6UHq3Gr/oRCJZiqev5iYGOSJWrkSsucL3CslfBlislE3oiZJRLRONQJ+TQ2p3mVUDNNyy2Lf/NBn4SUunA1778aD3mrhd1mcGPOQ1PnQOoq4NSva9Ux9p1esns2nyX1LQVxZuA6ZsxMkxgCUcD4vptet711oew== 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 determine a CXL memory is online. Use case: certain memory operations are permitted when the memory is offline only, for eg. some memory repair operations. Co-developed-by: Jonathan Cameron Signed-off-by: Jonathan Cameron Signed-off-by: Shiju Jose --- drivers/cxl/core/core.h | 9 +++++++++ drivers/cxl/core/region.c | 10 ++++++++++ 2 files changed, 19 insertions(+) diff --git a/drivers/cxl/core/core.h b/drivers/cxl/core/core.h index 23761340e65c..fb3b5f1229e7 100644 --- a/drivers/cxl/core/core.h +++ b/drivers/cxl/core/core.h @@ -32,8 +32,17 @@ int cxl_get_poison_by_endpoint(struct cxl_port *port); struct cxl_region *cxl_dpa_to_region(const struct cxl_memdev *cxlmd, u64 dpa); u64 cxl_dpa_to_hpa(struct cxl_region *cxlr, const struct cxl_memdev *cxlmd, u64 dpa); +bool cxl_are_decoders_committed(const struct cxl_memdev *cxlmd); #else +static inline bool cxl_are_decoders_committed(const struct cxl_memdev *cxlmd) +{ + /* + * If no driver, in absence of a way to check, assume decoders are committed. + */ + return true; +} + static inline u64 cxl_dpa_to_hpa(struct cxl_region *cxlr, const struct cxl_memdev *cxlmd, u64 dpa) { diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c index 5339237ced0f..33a3ef839f6a 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -2851,6 +2851,16 @@ struct cxl_region *cxl_dpa_to_region(const struct cxl_memdev *cxlmd, u64 dpa) return ctx.cxlr; } +bool cxl_are_decoders_committed(const struct cxl_memdev *cxlmd) +{ + struct cxl_port *port = cxlmd->endpoint; + + if (port && is_cxl_endpoint(port) && cxl_num_decoders_committed(port)) + return true; + + return false; +} + static bool cxl_is_hpa_in_chunk(u64 hpa, struct cxl_region *cxlr, int pos) { struct cxl_region_params *p = &cxlr->params;