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| author | Shiju Jose <shiju.jose@huawei.com> | 2025-05-21 13:47:44 +0100 |
|---|---|---|
| committer | Dave Jiang <dave.jiang@intel.com> | 2025-05-23 13:24:38 -0700 |
| commit | 0b5ccb0de1e2cf83f18f012f0e6ba4365be9dd4b (patch) | |
| tree | 21517dff7d6580ada3eaa4f8f9fb36df7e251f2d /drivers/cxl/cxlmem.h | |
| parent | 077ee5f7ddcfd482ecac504b3f711aa5e4c049fe (diff) | |
| download | linux-next-0b5ccb0de1e2cf83f18f012f0e6ba4365be9dd4b.tar.gz linux-next-0b5ccb0de1e2cf83f18f012f0e6ba4365be9dd4b.zip | |
cxl/edac: Support for finding memory operation attributes from the current boot
Certain operations on memory, such as memory repair, are permitted
only when the address and other attributes for the operation are
from the current boot. This is determined by checking whether the
memory attributes for the operation match those in the CXL gen_media
or CXL DRAM memory event records reported during the current boot.
The CXL event records must be backed up because they are cleared
in the hardware after being processed by the kernel.
Support is added for storing CXL gen_media or CXL DRAM memory event
records in xarrays. Old records are deleted when they expire or when
there is an overflow and which depends on platform correctly report
Event Record Timestamp field of CXL spec Table 8-55 Common Event
Record Format.
Additionally, helper functions are implemented to find a matching
record in the xarray storage based on the memory attributes and
repair type.
Add validity check, when matching attributes for sparing, using
the validity flag in the DRAM event record, to ensure that all
required attributes for a requested repair operation are valid and
set.
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Co-developed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Link: https://patch.msgid.link/20250521124749.817-7-shiju.jose@huawei.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Diffstat (limited to 'drivers/cxl/cxlmem.h')
| -rw-r--r-- | drivers/cxl/cxlmem.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index 1d4fe19c554d..551b0ba2caa1 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -47,6 +47,9 @@ * @depth: endpoint port depth * @scrub_cycle: current scrub cycle set for this device * @scrub_region_id: id number of a backed region (if any) for which current scrub cycle set + * @err_rec_array: List of xarrarys to store the memdev error records to + * check attributes for a memory repair operation are from + * current boot. */ struct cxl_memdev { struct device dev; @@ -60,6 +63,7 @@ struct cxl_memdev { int depth; u8 scrub_cycle; int scrub_region_id; + void *err_rec_array; }; static inline struct cxl_memdev *to_cxl_memdev(struct device *dev) @@ -861,11 +865,22 @@ int cxl_clear_poison(struct cxl_memdev *cxlmd, u64 dpa); #ifdef CONFIG_CXL_EDAC_MEM_FEATURES int devm_cxl_memdev_edac_register(struct cxl_memdev *cxlmd); int devm_cxl_region_edac_register(struct cxl_region *cxlr); +int cxl_store_rec_gen_media(struct cxl_memdev *cxlmd, union cxl_event *evt); +int cxl_store_rec_dram(struct cxl_memdev *cxlmd, union cxl_event *evt); +void devm_cxl_memdev_edac_release(struct cxl_memdev *cxlmd); #else static inline int devm_cxl_memdev_edac_register(struct cxl_memdev *cxlmd) { return 0; } static inline int devm_cxl_region_edac_register(struct cxl_region *cxlr) { return 0; } +static inline int cxl_store_rec_gen_media(struct cxl_memdev *cxlmd, + union cxl_event *evt) +{ return 0; } +static inline int cxl_store_rec_dram(struct cxl_memdev *cxlmd, + union cxl_event *evt) +{ return 0; } +static inline void devm_cxl_memdev_edac_release(struct cxl_memdev *cxlmd) +{ return; } #endif #ifdef CONFIG_CXL_SUSPEND |