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Fri, 28 Feb 2025 06:39:32 +0800 (CST) Received: from P_UKIT01-A7bmah.china.huawei.com (10.48.149.240) 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; Thu, 27 Feb 2025 23:39:30 +0100 From: To: , , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH 5/8] cxl/region: Add helper function to determine memory is online Date: Thu, 27 Feb 2025 22:38:12 +0000 Message-ID: <20250227223816.2036-6-shiju.jose@huawei.com> X-Mailer: git-send-email 2.43.0.windows.1 In-Reply-To: <20250227223816.2036-1-shiju.jose@huawei.com> References: <20250227223816.2036-1-shiju.jose@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.48.149.240] X-ClientProxiedBy: lhrpeml500011.china.huawei.com (7.191.174.215) To frapeml500007.china.huawei.com (7.182.85.172) X-Stat-Signature: rkppgk5i7ec1zb17z4imwzgj4oti7gsi X-Rspamd-Queue-Id: 1A37BC000B X-Rspam-User: X-Rspamd-Server: rspam01 X-HE-Tag: 1740695973-775755 X-HE-Meta: U2FsdGVkX1843WWuGQVpwjg+r1g1U5MFSe6KaI/gsLryw4ScqpHcP16QYZZ+EAEEf6M4k21ghKFHGqniE8uhAQ/SNfAY1i9EC5/fhIFN2UXeKhLU+9pVRGz73DjaO2TFgD2J1tXILkpcKRRSjWLx5PufQba7Cg521m8C/mILSQZzKCITcw2AvdscvSCoLiUtvAIsc6FNvm5lNkfAD2jtSML8riI+5TwpzhVDnpltqz/NXkqlvimGM+CrhzHFDzvXlhkyNZLeL4J2C8vE2su44AMUIqXMNGl/pC+LepgWl8MQEgUxxCnU2vS+Jm9H7rzJUf9GW3QgQ+jqxq1Dks84G39W7/Q23F5k1Ncx0gkIgKzPhIDAwc/lKYjfYJrVVJ+VTeXfeN1BOlYqsgLSxVROfMNp85C73VTgQhKY3bW4oTj5Nx9ryCJJIg3aEnSSS8/qa3oGFK/sqdrz/GswxYxTSLjDULEV0I27pOAB3yRUpw+wMOPhGjBiN9JmQrAqTsg9cHwF9QUvXkjh/FYJbRv7ZZ7I5fOho8QpnIKIPVUrDlrphVuaVDH94Yqb8E9Xqlk09+W09M7QGwCfjF3gksg09GbdkfcLKhyLtvfF1gT3eofCBaymYvohQVKG2N7D+tYbp9sSYzWJlZblDbyJ6m5Ap5ZB8AxQN7/rhiX0zXWk0nVIk2WAgUXA2yL1ahLC5JS6TARDtHo20VEcdnixllqRH3WHkGzNiVEM7IhfgoBWcS4KuL9TH/bHemdf0Zt4SEr7GcThbUpyyKZ0Vc5LcapbhtcxQqYj71pu8s8vghC2uxhfUhuRGvcjxRWlIYKs40aEb34zLmRjT61vPRagMhqaebMwb2YaBCKLQSBSRgUcXdorvHPsguHzOHV/8PccaohPRy8L/dZMJ8OOApCxdaDSc7QzwLUoHuL6RCdtQcoFKXgsQfrwUfeMEh4k0zbaa2Dy7mGfcih1RBijOrevA6F h8ntsx39 dlPhv6uh4BC4IitKlu0rRlgFUHZ2U2at6p1HivlzXEC8e0+nf6lJbDKzcreTP6DWa4eaHRd7KGtbov8llwI7KDyRDH94RjZv7uH//jJ8+5T1QsLHCbPZcglZm5sRYmuzz8cPTjyrEch8gMCrtnFmyXTiHChUthgYjGcCE6kPXtxo3V4t0ojKIvAZMcDMP0l09Ms5NrB9pVzEjLuOu/9KW/PKvfUzLQeaj49cOWQKYIPBnm/McsAEq19LTMQ== 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 6c83f6f18122..386e36b18c19 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 9e7b716296d7..3fd14cb0c470 100644 --- a/drivers/cxl/core/region.c +++ b/drivers/cxl/core/region.c @@ -2864,6 +2864,16 @@ 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;