RAS: Introduce AMD Address Translation Library

[sfrench/cifs-2.6.git] / drivers / ras / ras.c

diff --git a/drivers/ras/ras.c b/drivers/ras/ras.c
index 95540ea8dd9db905fa76019e9a0ce618c053a84c..a6e4792a1b2e9239f44f29102a7cc058d64b93ef 100644 (file)
--- a/drivers/ras/ras.c
+++ b/drivers/ras/ras.c
@@ -10,6 +10,37 @@
 #include <linux/ras.h>
 #include <linux/uuid.h>
 
+#if IS_ENABLED(CONFIG_AMD_ATL)
+/*
+ * Once set, this function pointer should never be unset.
+ *
+ * The library module will set this pointer if it successfully loads. The module
+ * should not be unloaded except for testing and debug purposes.
+ */
+static unsigned long (*amd_atl_umc_na_to_spa)(struct atl_err *err);
+
+void amd_atl_register_decoder(unsigned long (*f)(struct atl_err *))
+{
+       amd_atl_umc_na_to_spa = f;
+}
+EXPORT_SYMBOL_GPL(amd_atl_register_decoder);
+
+void amd_atl_unregister_decoder(void)
+{
+       amd_atl_umc_na_to_spa = NULL;
+}
+EXPORT_SYMBOL_GPL(amd_atl_unregister_decoder);
+
+unsigned long amd_convert_umc_mca_addr_to_sys_addr(struct atl_err *err)
+{
+       if (!amd_atl_umc_na_to_spa)
+               return -EINVAL;
+
+       return amd_atl_umc_na_to_spa(err);
+}
+EXPORT_SYMBOL_GPL(amd_convert_umc_mca_addr_to_sys_addr);
+#endif /* CONFIG_AMD_ATL */
+
 #define CREATE_TRACE_POINTS
 #define TRACE_INCLUDE_PATH ../../include/ras
 #include <ras/ras_event.h>