From: Long Li <longli@microsoft.com>
To: "K . Y . Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
"David S . Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Shradha Gupta <shradhagupta@linux.microsoft.com>,
Simon Horman <horms@kernel.org>,
Konstantin Taranov <kotaranov@microsoft.com>,
Souradeep Chakrabarti <schakrabarti@linux.microsoft.com>,
Erick Archer <erick.archer@outlook.com>,
linux-hyperv@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org
Cc: Long Li <longli@microsoft.com>
Subject: [PATCH v2 net-next 0/6] net: mana: Per-vPort EQ and MSI-X interrupt management
Date: Tue, 3 Mar 2026 16:00:11 -0800 [thread overview]
Message-ID: <20260304000017.333312-1-longli@microsoft.com> (raw)
This series adds per-vPort Event Queue (EQ) allocation and MSI-X interrupt
management for the MANA driver. Previously, all vPorts shared a single set
of EQs. This change enables dedicated EQs per vPort with support for both
dedicated and shared MSI-X vector allocation modes.
Patch 1 moves EQ ownership from mana_context to per-vPort mana_port_context
and exports create/destroy functions for the RDMA driver.
Patch 2 adds device capability queries to determine whether MSI-X vectors
should be dedicated per-vPort or shared. When the number of available MSI-X
vectors is insufficient for dedicated allocation, the driver enables sharing
mode with bitmap-based vector assignment.
Patch 3 introduces the GIC (GDMA IRQ Context) abstraction with reference
counting, allowing multiple EQs to safely share a single MSI-X vector.
Patch 4 converts the global EQ allocation in probe/resume to use the new
GIC functions.
Patch 5 adds per-vPort GIC lifecycle management, calling get/put on each
EQ creation and destruction during vPort open/close.
Patch 6 extends the same GIC lifecycle management to the RDMA driver's EQ
allocation path and advertises the EQ_MSI_UNSHARE_MULTI_VPORT capability.
Tested on Azure VMs with 2, 3, and 4 NIC configurations:
- Both MSI sharing modes verified: mode 0 (dedicated) and mode 1 (shared)
- NIC up/down with clean VF data path switch on all interfaces
- Bulk NIC down/up (all interfaces simultaneously)
- iperf3 throughput: up to 181 Gbps (16 streams, Boost192)
Changes in v2:
- Rebased onto net-next/main
- Fixed spelling typo in patch 3 ("difference" -> "different")
- Moved HW_VPORT_LINK_AWARE define to numerical order in patch 6
Long Li (6):
net: mana: Create separate EQs for each vPort
net: mana: Query device capabilities and configure MSI-X sharing for
EQs
net: mana: Introduce GIC context with refcounting for interrupt
management
net: mana: Use GIC functions to allocate global EQs
net: mana: Allocate interrupt context for each EQ when creating vPort
RDMA/mana_ib: Allocate interrupt contexts on EQs
drivers/infiniband/hw/mana/main.c | 47 ++-
drivers/infiniband/hw/mana/qp.c | 4 +-
.../net/ethernet/microsoft/mana/gdma_main.c | 309 +++++++++++++-----
drivers/net/ethernet/microsoft/mana/mana_en.c | 162 +++++----
include/net/mana/gdma.h | 31 +-
include/net/mana/mana.h | 7 +-
6 files changed, 402 insertions(+), 158 deletions(-)
--
2.43.0
next reply other threads:[~2026-03-04 0:00 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-04 0:00 Long Li [this message]
2026-03-04 0:00 ` [PATCH v2 net-next 1/6] net: mana: Create separate EQs for each vPort Long Li
2026-03-04 14:58 ` Leon Romanovsky
2026-03-06 16:08 ` [v2,net-next,1/6] " Simon Horman
2026-03-06 20:45 ` [EXTERNAL] " Long Li
2026-03-04 0:00 ` [PATCH v2 net-next 2/6] net: mana: Query device capabilities and configure MSI-X sharing for EQs Long Li
2026-03-04 0:00 ` [PATCH v2 net-next 3/6] net: mana: Introduce GIC context with refcounting for interrupt management Long Li
2026-03-04 0:00 ` [PATCH v2 net-next 4/6] net: mana: Use GIC functions to allocate global EQs Long Li
2026-03-04 0:00 ` [PATCH v2 net-next 5/6] net: mana: Allocate interrupt context for each EQ when creating vPort Long Li
2026-03-04 0:00 ` [PATCH v2 net-next 6/6] RDMA/mana_ib: Allocate interrupt contexts on EQs Long Li
2026-03-04 14:59 ` Leon Romanovsky
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=20260304000017.333312-1-longli@microsoft.com \
--to=longli@microsoft.com \
--cc=davem@davemloft.net \
--cc=decui@microsoft.com \
--cc=edumazet@google.com \
--cc=erick.archer@outlook.com \
--cc=haiyangz@microsoft.com \
--cc=horms@kernel.org \
--cc=kotaranov@microsoft.com \
--cc=kuba@kernel.org \
--cc=kys@microsoft.com \
--cc=linux-hyperv@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rdma@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=schakrabarti@linux.microsoft.com \
--cc=shradhagupta@linux.microsoft.com \
--cc=wei.liu@kernel.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.