| From: |
| Keith Busch <kbusch-AT-kernel.org> |
| To: |
| linux-nvme-AT-lists.infradead.org, linux-kernel-AT-vger.kernel.org, linux-block-AT-vger.kernel.org |
| Subject: |
| [RFC 0/7] 64-bit data integrity field support |
| Date: |
| Mon, 24 Jan 2022 08:01:00 -0800 |
| Message-ID: |
| <20220124160107.1683901-1-kbusch@kernel.org> |
| Cc: |
| axboe-AT-kernel.dk, hch-AT-lst.de, martin.petersen-AT-oracle.com, colyli-AT-suse.de, arnd-AT-arndb.de, Keith Busch <kbusch-AT-kernel.org> |
| Archive-link: |
| Article |
The NVM Express protocol added enhancements to the data integrity field
formats beyond the T10 defined protection information. A detailed
description of the new formats can be found in the NVMe's NVM Command
Set Specification, section 5.2, available at:
https://nvmexpress.org/wp-content/uploads/NVM-Command-Set...
This series implements one possible new format: the CRC64 guard with
48-bit reference tags. This does not add support for the variable
"storage tag" field.
The NVMe CRC64 parameters (from Rocksoft) were not implemented in the
kernel, so a software implementation is included in this series based on
the generated table. This series does not include any possible hardware
excelleration (ex: x86's pclmulqdq), so it's not very high performant
right now.
Keith Busch (7):
block: support pi with extended metadata
nvme: allow integrity on extended metadata formats
lib: add rocksoft model crc64
lib: add crc64 tests
asm-generic: introduce be48 unaligned accessors
block: add pi for nvme enhanced integrity
nvme: add support for enhanced metadata
block/Kconfig | 1 +
block/bio-integrity.c | 1 +
block/t10-pi.c | 198 +++++++++++++++++++++++++++++++-
drivers/nvme/host/core.c | 167 ++++++++++++++++++++++-----
drivers/nvme/host/nvme.h | 1 +
include/asm-generic/unaligned.h | 26 +++++
include/linux/blk-integrity.h | 1 +
include/linux/crc64.h | 2 +
include/linux/nvme.h | 53 ++++++++-
include/linux/t10-pi.h | 20 ++++
lib/Kconfig.debug | 3 +
lib/Makefile | 1 +
lib/crc64.c | 79 +++++++++++++
lib/gen_crc64table.c | 33 ++++--
lib/test_crc64.c | 68 +++++++++++
15 files changed, 608 insertions(+), 46 deletions(-)
create mode 100644 lib/test_crc64.c
--
2.25.4
