EDAC: Update memory repair control interface for memory sparing feature

Update memory repair control interface for memory sparing feature.

CXL memory devices can support soft and hard memory sparing at cacheline,
row, bank and rank granularities. Memory sparing is defined as a repair
function that replaces a portion of memory with a portion of functional
memory at that same granularity.

When a CXL device detects an error in memory, it will report to the host
that there's need for a repair maintenance operation by using an event
record where the "maintenance needed" flag is set.

The event records contain the device physical address (DPA) and other
attributes of the memory to repair such as bank group, bank, rank, row,
column, channel etc.

The kernel will report the corresponding CXL general media or DRAM trace
event to userspace, and userspace tools (e.g. rasdaemon) will initiate
a repair operation in response to the device request via the sysfs
repair control.

  [ bp: Massage. ]

Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20250212143654.1893-15-shiju.jose@huawei.com

1 files changed, 28 insertions, 0 deletions

diff --git a/include/linux/edac.h b/include/linux/edac.h
index cfb2ef41ab95..451f9c152c99 100644
--- a/include/linux/edac.h
+++ b/include/linux/edac.h
@@ -780,6 +780,20 @@ enum edac_mem_repair_cmd {
  * @get_max_dpa: get the maximum supported device physical address (DPA).
  * @get_nibble_mask: get current nibble mask of memory to repair.
  * @set_nibble_mask: set nibble mask of memory to repair.
+ * @get_bank_group: get current bank group of memory to repair.
+ * @set_bank_group: set bank group of memory to repair.
+ * @get_bank: get current bank of memory to repair.
+ * @set_bank: set bank of memory to repair.
+ * @get_rank: get current rank of memory to repair.
+ * @set_rank: set rank of memory to repair.
+ * @get_row: get current row of memory to repair.
+ * @set_row: set row of memory to repair.
+ * @get_column: get current column of memory to repair.
+ * @set_column: set column of memory to repair.
+ * @get_channel: get current channel of memory to repair.
+ * @set_channel: set channel of memory to repair.
+ * @get_sub_channel: get current subchannel of memory to repair.
+ * @set_sub_channel: set subchannel of memory to repair.
  * @do_repair: Issue memory repair operation for the HPA/DPA and
  *	       other control attributes set for the memory to repair.
  *
@@ -800,6 +814,20 @@ struct edac_mem_repair_ops {
 	int (*get_max_dpa)(struct device *dev, void *drv_data, u64 *dpa);
 	int (*get_nibble_mask)(struct device *dev, void *drv_data, u32 *val);
 	int (*set_nibble_mask)(struct device *dev, void *drv_data, u32 val);
+	int (*get_bank_group)(struct device *dev, void *drv_data, u32 *val);
+	int (*set_bank_group)(struct device *dev, void *drv_data, u32 val);
+	int (*get_bank)(struct device *dev, void *drv_data, u32 *val);
+	int (*set_bank)(struct device *dev, void *drv_data, u32 val);
+	int (*get_rank)(struct device *dev, void *drv_data, u32 *val);
+	int (*set_rank)(struct device *dev, void *drv_data, u32 val);
+	int (*get_row)(struct device *dev, void *drv_data, u32 *val);
+	int (*set_row)(struct device *dev, void *drv_data, u32 val);
+	int (*get_column)(struct device *dev, void *drv_data, u32 *val);
+	int (*set_column)(struct device *dev, void *drv_data, u32 val);
+	int (*get_channel)(struct device *dev, void *drv_data, u32 *val);
+	int (*set_channel)(struct device *dev, void *drv_data, u32 val);
+	int (*get_sub_channel)(struct device *dev, void *drv_data, u32 *val);
+	int (*set_sub_channel)(struct device *dev, void *drv_data, u32 val);
 	int (*do_repair)(struct device *dev, void *drv_data, u32 val);
 };