| From: |
| Rahul Lakkireddy <rahul.lakkireddy-AT-chelsio.com> |
| To: |
| x86-AT-kernel.org, linux-kernel-AT-vger.kernel.org, netdev-AT-vger.kernel.org |
| Subject: |
| [RFC PATCH 0/3] kernel: add support for 256-bit IO access |
| Date: |
| Mon, 19 Mar 2018 19:50:33 +0530 |
| Message-ID: |
| <cover.1521469118.git.rahul.lakkireddy@chelsio.com> |
| Cc: |
| tglx-AT-linutronix.de, mingo-AT-redhat.com, hpa-AT-zytor.com, davem-AT-davemloft.net, akpm-AT-linux-foundation.org, torvalds-AT-linux-foundation.org, ganeshgr-AT-chelsio.com, nirranjan-AT-chelsio.com, indranil-AT-chelsio.com, Rahul Lakkireddy <rahul.lakkireddy-AT-chelsio.com> |
This series of patches add support for 256-bit IO read and write.
The APIs are readqq and writeqq (quad quadword - 4 x 64), that read
and write 256-bits at a time from IO, respectively.
Patch 1 adds u256 type and adds necessary non-atomic accessors. Also
adds byteorder conversion APIs.
Patch 2 adds 256-bit read and write to x86 via VMOVDQU AVX CPU
instructions.
Patch 3 updates cxgb4 driver to use the readqq API to speed up
reading on-chip memory 256-bits at a time.
Feedback and suggestions will be much appreciated.
Thanks,
Rahul
Rahul Lakkireddy (3):
include/linux: add 256-bit IO accessors
x86/io: implement 256-bit IO read and write
cxgb4: read on-chip memory 256-bits at a time
arch/x86/include/asm/io.h | 57 ++++++++++++++++++++++++-
drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c | 16 +++----
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h | 6 +++
include/linux/byteorder/generic.h | 48 +++++++++++++++++++++
include/linux/io-64-nonatomic-hi-lo.h | 59 ++++++++++++++++++++++++++
include/linux/io-64-nonatomic-lo-hi.h | 59 ++++++++++++++++++++++++++
include/linux/types.h | 7 +++
7 files changed, 243 insertions(+), 9 deletions(-)
--
2.14.1
