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Wed, 12 Feb 2025 22:37:44 +0800 (CST) Received: from P_UKIT01-A7bmah.china.huawei.com (10.126.169.206) 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; Wed, 12 Feb 2025 15:37:42 +0100 From: To: , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v20 11/15] cxl/region: Add helper function to determine memory is online Date: Wed, 12 Feb 2025 14:36:49 +0000 Message-ID: <20250212143654.1893-12-shiju.jose@huawei.com> X-Mailer: git-send-email 2.43.0.windows.1 In-Reply-To: <20250212143654.1893-1-shiju.jose@huawei.com> References: <20250212143654.1893-1-shiju.jose@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.126.169.206] X-ClientProxiedBy: lhrpeml100003.china.huawei.com (7.191.160.210) To frapeml500007.china.huawei.com (7.182.85.172) X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 8C8044001A X-Stat-Signature: 5h9jobk7bhkdkmy3d5d6p17tt1zwb5s1 X-HE-Tag: 1739371066-19683 X-HE-Meta: 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 vo+2oJaa H3KxG7I9XIR3ckG6ZNeVfSOUz5Q3Qxg2PLxo0vyf4w86aDF2pW7bvaEsoDqwZTkSp/6geQYDeDdffUajOclsWlUCNGwDBz7aoQ60I5QWSI+4dG3DuHmLjCGKchphdPkFu/BXpUSIA3rxqCQbE99oihySbsQcQSZyf6pSOEw+c4NGJL5fX9ZHqbOWwhQnBMxki1eCBHdrWdgtt5IZBOMkj6xFIq/8z+uZEwqOFJ0b4KnRqKKxKNQoI9mqYNg== 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 3f5474f155d0..e10019d17a3c 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;