From: Bob Pearson <rpearsonhpe@gmail.com>
To: jgg@nvidia.com, zyjzyj2000@gmail.com, linux-rdma@vger.kernel.org
Cc: Bob Pearson <rpearsonhpe@gmail.com>
Subject: [PATCH for-next v4 0/6] Replace AV by AH in UD sends
Date: Wed, 29 Sep 2021 23:25:58 -0500 [thread overview]
Message-ID: <20210930042603.4318-1-rpearsonhpe@gmail.com> (raw)
Currently the rdma_rxe driver and its user space provider exchange
addressing information for UD sends by having the provider compute an
address vector (AV) and send it with each WQE. This is not the way
that the RDMA verbs API was intended to operate.
This series of patches modifies the way UD send WQEs work by exchanging
an index identifying the AH replacing the 88 byte AV by a 4 byte AH
index. In order to not break compatibility with the existing API the
rdma_rxe driver will recognise when an older version of the provider
is not sending an index (i.e. it is 0) and will use the AV instead.
This series of patches is almost identical to an earlier version
but rebased to 5.15.0-rc1+. It applies cleanly to
450f4f6aa1a369cc3ffadc1c7e27dfab3e90199f (for-next)
v4:
Rebase to 5.15.0-rc1+
v3:
Split up commits into smaller steps.
v2:
Rearranged AV in rxe_send_wqe to be in the ud struct but padded to the
same offset as the original preserving ABI compatibility.
Bob Pearson (6):
RDMA/rxe: Move AV from rxe_send_wqe to rxe_send_wr
RDMA/rxe: Change AH objects to indexed
RDMA/rxe: Create AH index and return to user space
RDMA/rxe: Replace ah->pd by ah->ibah.pd
RDMA/rxe: Lookup kernel AH from ah index in UD WQEs
RDMA/rxe: Convert kernel UD post send to use ah_num
drivers/infiniband/sw/rxe/rxe_av.c | 20 +++++++++++++-
drivers/infiniband/sw/rxe/rxe_param.h | 4 ++-
drivers/infiniband/sw/rxe/rxe_pool.c | 4 ++-
drivers/infiniband/sw/rxe/rxe_req.c | 8 +++---
drivers/infiniband/sw/rxe/rxe_verbs.c | 39 ++++++++++++++++++++++-----
drivers/infiniband/sw/rxe/rxe_verbs.h | 8 +++++-
include/uapi/rdma/rdma_user_rxe.h | 10 ++++++-
7 files changed, 79 insertions(+), 14 deletions(-)
--
2.30.2
next reply other threads:[~2021-09-30 4:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-30 4:25 Bob Pearson [this message]
2021-09-30 4:25 ` [PATCH for-next v4 1/6] RDMA/rxe: Move AV from rxe_send_wqe to rxe_send_wr Bob Pearson
2021-09-30 4:26 ` [PATCH for-next v4 2/6] RDMA/rxe: Change AH objects to indexed Bob Pearson
2021-09-30 4:26 ` [PATCH for-next v4 3/6] RDMA/rxe: Create AH index and return to user space Bob Pearson
2021-09-30 4:26 ` [PATCH for-next v4 4/6] RDMA/rxe: Replace ah->pd by ah->ibah.pd Bob Pearson
2021-09-30 4:26 ` [PATCH for-next v4 5/6] RDMA/rxe: Lookup kernel AH from ah index in UD WQEs Bob Pearson
2021-09-30 4:26 ` [PATCH for-next v4 6/6] RDMA/rxe: Convert kernel UD post send to use ah_num Bob Pearson
2021-10-05 17:36 ` [PATCH for-next v4 0/6] Replace AV by AH in UD sends Jason Gunthorpe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210930042603.4318-1-rpearsonhpe@gmail.com \
--to=rpearsonhpe@gmail.com \
--cc=jgg@nvidia.com \
--cc=linux-rdma@vger.kernel.org \
--cc=zyjzyj2000@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).