diff options
Diffstat (limited to 'drivers/cxl/cxlmem.h')
| -rw-r--r-- | drivers/cxl/cxlmem.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index b1a72e01e4de..1b39afeb369e 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -254,6 +254,20 @@ struct cxl_poison_state { struct mutex lock; /* Protect reads of poison list */ }; +/* + * enum cxl_devtype - delineate type-2 from a generic type-3 device + * @CXL_DEVTYPE_DEVMEM - Vendor specific CXL Type-2 device implementing HDM-D or + * HDM-DB, no requirement that this device implements a + * mailbox, or other memory-device-standard manageability + * flows. + * @CXL_DEVTYPE_CLASSMEM - Common class definition of a CXL Type-3 device with + * HDM-H and class-mandatory memory device registers + */ +enum cxl_devtype { + CXL_DEVTYPE_DEVMEM, + CXL_DEVTYPE_CLASSMEM, +}; + /** * struct cxl_dev_state - The driver device state * @@ -272,6 +286,7 @@ struct cxl_poison_state { * @ram_res: Active Volatile memory capacity configuration * @component_reg_phys: register base of component registers * @serial: PCIe Device Serial Number + * @type: Generic Memory Class device or Vendor Specific Memory device */ struct cxl_dev_state { struct device *dev; @@ -285,6 +300,7 @@ struct cxl_dev_state { struct resource ram_res; resource_size_t component_reg_phys; u64 serial; + enum cxl_devtype type; }; /** @@ -343,6 +359,8 @@ struct cxl_memdev_state { static inline struct cxl_memdev_state * to_cxl_memdev_state(struct cxl_dev_state *cxlds) { + if (cxlds->type != CXL_DEVTYPE_CLASSMEM) + return NULL; return container_of(cxlds, struct cxl_memdev_state, cxlds); } |