On Fri, Apr 24, 2015 at 8:56 AM, Toshi Kani <toshi.kani@xxxxxx> wrote: > On Fri, 2015-04-17 at 21:35 -0400, Dan Williams wrote: >> Most configuration of the nd-subsystem is done via nd-sysfs. However, >> the NFIT specification defines a small set of messages that can be >> passed to the subsystem via platform-firmware-defined methods. The >> command set (as of the current version of the NFIT-DSM spec) is: >> >> NFIT_CMD_SMART: media health and diagnostics >> NFIT_CMD_GET_CONFIG_SIZE: size of the label space >> NFIT_CMD_GET_CONFIG_DATA: read label >> NFIT_CMD_SET_CONFIG_DATA: write label >> NFIT_CMD_VENDOR: vendor-specific command passthrough >> NFIT_CMD_ARS_CAP: report address-range-scrubbing capabilities >> NFIT_CMD_START_ARS: initiate scrubbing >> NFIT_CMD_QUERY_ARS: report on scrubbing state >> NFIT_CMD_SMART_THRESHOLD: configure alarm thresholds for smart events > > "nd/bus.c" provides two features, 1) the top level ND bus driver which > is the central part of the ND, and 2) the ioctl interface specific to > the example-DSM-interface. I think the example-DSM-specific part should > be put into an example-DSM-support module, so that the ND can support > other _DSMs as necessary. Also, _DSM needs to be handled as optional. I don't think it needs to be separated, they'll both end up using the same infrastructure just with different UUIDs on the ACPI device interface or different format-interface-codes. A firmware implementation is also free to disable individual DSMs (see nd_acpi_add_dimm). That said, you're right, we do need a fix to allow PMEM from DIMMs without DSMs to activate. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
