Re: [PATCH v6 19/21] libnvdimm, nfit, nd_blk: driver for BLK-mode access persistent memory

From: Rafael J. Wysocki
Date: Wed Jun 17 2015 - 17:43:21 EST

On Thursday, June 11, 2015 04:11:53 PM Dan Williams wrote:
> From: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
> The libnvdimm implementation handles allocating dimm address space (DPA)
> between PMEM and BLK mode interfaces. After DPA has been allocated from
> a BLK-region to a BLK-namespace the nd_blk driver attaches to handle I/O
> as a struct bio based block device. Unlike PMEM, BLK is required to
> handle platform specific details like mmio register formats and memory
> controller interleave. For this reason the libnvdimm generic nd_blk
> driver calls back into the bus provider to carry out the I/O.
> This initial implementation handles the BLK interface defined by the
> ACPI 6 NFIT [1] and the NVDIMM DSM Interface Example [2] composed from
> DCR (dimm control region), BDW (block data window), IDT (interleave
> descriptor) NFIT structures and the hardware register format.
> [1]:
> [2]:
> Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
> Cc: Boaz Harrosh <boaz@xxxxxxxxxxxxx>
> Cc: H. Peter Anvin <hpa@xxxxxxxxx>
> Cc: Jens Axboe <axboe@xxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Christoph Hellwig <hch@xxxxxx>
> Signed-off-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>

For the ACPI part:

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>

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